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  1. <!doctype html>
    2. 

  2. <html lang="zh-CN">
    3. 

  3.   <head>
    4. 

  4.     <meta charset="UTF-8" />
    5. 

  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    6. 

  6.     <meta name="description" content="MailHub — self-hosted transactional email with API, SMTP, DNS and webhooks." />
    7. 

  7.     <title>MailHub</title>
    8. 

  8.     <script type="module" crossorigin src="/assets/landing-BUb9icyI.js"></script>
    9. 

  9.     <link rel="modulepreload" crossorigin href="/assets/modulepreload-polyfill-Dezn_h7o.js">
    10. 

  10.     <link rel="stylesheet" crossorigin href="/assets/landing-BkPrzdt8.css">
    11. 

  11.   </head>
    12. 

  12.   <body>
    13. 

  13.     <div class="page">
    14. 

  14.       <header class="site-header">
    15. 

  15.         <a class="brand" href="#top">
    16. 

  16.           <span class="brand-mark">MH</span>
    17. 

  17.           <span class="brand-name">MailHub</span>
    18. 

  18.         </a>
    19. 

  19.         <nav class="nav-links" aria-label="Primary">
    20. 

  20.           <a href="#features" data-i18n="nav.features">Features</a>
    21. 

  21.           <a href="#quickstart" data-i18n="nav.quickstart">Quick start</a>
    22. 

  22.           <a href="#api" data-i18n="nav.api">API</a>
    23. 

  23.           <a href="#mailboxes" data-i18n="nav.mailboxes">Mailboxes</a>
    24. 

  24.           <a href="#receiving" data-i18n="nav.receiving">Receiving</a>
    25. 

  25.           <a href="#domains" data-i18n="nav.domains">Domain setup</a>
    26. 

  26.           <a href="#smtp" data-i18n="nav.smtp">SMTP</a>
    27. 

  27.           <a href="#webhooks" data-i18n="nav.webhooks">Webhooks</a>
    28. 

  28.         </nav>
    29. 

  29.         <div class="header-actions">
    30. 

  30.           <div class="lang-switch" role="group" aria-label="Language">
    31. 

  31.             <button type="button" data-locale="zh-CN" class="lang-btn">中文</button>
    32. 

  32.             <button type="button" data-locale="en-US" class="lang-btn">EN</button>
    33. 

  33.           </div>
    34. 

  34.           <a
    35. 

  35.             class="btn btn-ghost"
    36. 

  36.             href="https://github.com/chendeben/MailHub"
    37. 

  37.             target="_blank"
    38. 

  38.             rel="noopener noreferrer"
    39. 

  39.             data-i18n="cta.github"
    40. 

  40.           >GitHub</a>
    41. 

  41.           <a class="btn btn-ghost" href="/login" data-i18n="cta.login">Log in</a>
    42. 

  42.           <a class="btn btn-primary" href="/register" data-i18n="cta.signup">Get started</a>
    43. 

  43.         </div>
    44. 

  44.       </header>
    45. 

  45. 

  46.       <main id="top">
    47. 

  47.         <section class="hero">
    48. 

  48.           <div class="hero-copy">
    49. 

  49.             <p class="eyebrow" data-i18n="hero.eyebrow">Transactional email platform</p>
    50. 

  50.             <h1 data-i18n="hero.title">Send reliable email via API &amp; SMTP</h1>
    51. 

  51.             <p class="lede" data-i18n="hero.lede">
    52. 

  52.               Self-hosted MailHub gives you domain DNS guidance, DKIM signing, delivery logs, and signed webhooks — without locking you into a black-box SaaS.
    53. 

  53.             </p>
    54. 

  54.             <div class="hero-cta">
    55. 

  55.               <a class="btn btn-primary btn-lg" href="/register" data-i18n="cta.signup">Get started</a>
    56. 

  56.               <a class="btn btn-ghost btn-lg" href="#api" data-i18n="cta.viewApi">View API sample</a>
    57. 

  57.             </div>
    58. 

  58.             <ul class="trust-strip">
    59. 

  59.               <li data-i18n="trust.selfHosted">Self-hosted</li>
    60. 

  60.               <li>DKIM</li>
    61. 

  61.               <li>SPF</li>
    62. 

  62.               <li>DMARC</li>
    63. 

  63.               <li data-i18n="trust.webhooks">Delivery webhooks</li>
    64. 

  64.             </ul>
    65. 

  65.           </div>
    66. 

  66.           <div class="hero-code" aria-hidden="false">
    67. 

  67.             <div class="code-card">
    68. 

  68.               <div class="code-card-bar">
    69. 

  69.                 <span>curl</span>
    70. 

  70.                 <button type="button" class="copy-btn" data-copy-target="hero-curl" data-i18n="common.copy">Copy</button>
    71. 

  71.               </div>
    72. 

  72.               <pre id="hero-curl"><code data-i18n-html="hero.curl"></code></pre>
    73. 

  73.             </div>
    74. 

  74.           </div>
    75. 

  75.         </section>
    76. 

  76. 

  77.         <section id="features" class="section">
    78. 

  78.           <div class="section-head">
    79. 

  79.             <h2 data-i18n="features.title">Built for production senders</h2>
    80. 

  80.             <p data-i18n="features.sub">Everything you need to authenticate domains and observe delivery.</p>
    81. 

  81.           </div>
    82. 

  82.           <div class="feature-grid">
    83. 

  83.             <article class="card"><h3 data-i18n="features.dns.title">Domains &amp; DNS</h3><p data-i18n="features.dns.body">Guided SPF, DKIM, DMARC, and one-click DNS provider writes.</p></article>
    84. 

  84.             <article class="card"><h3 data-i18n="features.smtp.title">SMTP Submission</h3><p data-i18n="features.smtp.body">App-friendly SMTP listeners with credentials you control.</p></article>
    85. 

  85.             <article class="card"><h3 data-i18n="features.api.title">HTTP Send API</h3><p data-i18n="features.api.body">Bearer tokens and a simple JSON send endpoint for apps and services.</p></article>
    86. 

  86.             <article class="card"><h3 data-i18n="features.mailboxes.title">Mailboxes &amp; receiving</h3><p data-i18n="features.mailboxes.body">Create persistent or expiring inboxes with IMAP, POP3, forwarding, and catch-all routing.</p></article>
    87. 

  87.             <article class="card"><h3 data-i18n="features.logs.title">Delivery logs</h3><p data-i18n="features.logs.body">Track queue and MTA outcomes with searchable send history.</p></article>
    88. 

  88.             <article class="card"><h3 data-i18n="features.hooks.title">Webhooks</h3><p data-i18n="features.hooks.body">Signed callbacks for sent, bounced, and failed terminal events.</p></article>
    89. 

  89.             <article class="card"><h3 data-i18n="features.multi.title">Multi-user isolation</h3><p data-i18n="features.multi.body">Domains, tokens, and logs stay scoped to each account.</p></article>
    90. 

  90.           </div>
    91. 

  91.         </section>
    92. 

  92. 

  93.         <section id="quickstart" class="section section-alt">
    94. 

  94.           <div class="section-head">
    95. 

  95.             <h2 data-i18n="quickstart.title">Start in four steps</h2>
    96. 

  96.             <p data-i18n="quickstart.sub">The console keeps domain, token, mailbox, and delivery configuration in one place.</p>
    97. 

  97.           </div>
    98. 

  98.           <div class="steps-grid">
    99. 

  99.             <article class="card">
    100. 

  100.               <span class="step-number">1</span>
    101. 

  101.               <h3 data-i18n="quickstart.domain.title">Add a domain</h3>
    102. 

  102.               <p data-i18n="quickstart.domain.body">Add your sending domain and publish the DNS records shown by MailHub.</p>
    103. 

  103.               <a class="text-link" href="#domains" data-i18n="quickstart.domain.link">Review domain setup →</a>
    104. 

  104.             </article>
    105. 

  105.             <article class="card">
    106. 

  106.               <span class="step-number">2</span>
    107. 

  107.               <h3 data-i18n="quickstart.token.title">Create a scoped token</h3>
    108. 

  108.               <p data-i18n="quickstart.token.body">Give each integration only the send or mailbox permissions it needs.</p>
    109. 

  109.               <a class="text-link" href="#api" data-i18n="quickstart.token.link">Review API access →</a>
    110. 

  110.             </article>
    111. 

  111.             <article class="card">
    112. 

  112.               <span class="step-number">3</span>
    113. 

  113.               <h3 data-i18n="quickstart.mailbox.title">Provision mailboxes</h3>
    114. 

  114.               <p data-i18n="quickstart.mailbox.body">Create persistent mailboxes in the console or create persistent and temporary mailboxes by API.</p>
    115. 

  115.               <a class="text-link" href="#mailboxes" data-i18n="quickstart.mailbox.link">Review mailbox API →</a>
    116. 

  116.             </article>
    117. 

  117.             <article class="card">
    118. 

  118.               <span class="step-number">4</span>
    119. 

  119.               <h3 data-i18n="quickstart.client.title">Connect your client</h3>
    120. 

  120.               <p data-i18n="quickstart.client.body">Use SMTP to send and IMAP or POP3 to receive with the mailbox's full address and password.</p>
    121. 

  121.               <a class="text-link" href="#smtp" data-i18n="quickstart.client.link">Review protocol settings →</a>
    122. 

  122.             </article>
    123. 

  123.           </div>
    124. 

  124.         </section>
    125. 

  125. 

  126.         <section id="api" class="section">
    127. 

  127.           <div class="section-head">
    128. 

  128.             <h2 data-i18n="api.title">API authentication and sending</h2>
    129. 

  129.             <p data-i18n="api.sub">All public API calls use a Bearer token. The hostname below is a placeholder; replace it with your MailHub host.</p>
    130. 

  130.           </div>
    131. 

  131.           <div class="doc-grid">
    132. 

  132.             <article class="card">
    133. 

  133.               <h3 data-i18n="api.auth.title">Create and protect a token</h3>
    134. 

  134.               <p data-i18n="api.auth.body">Create a token in Console &gt; API Tokens. Full tokens can be viewed and copied by the owning account, so keep console access restricted and never place tokens in browser code or public repositories.</p>
    135. 

  135.               <ul class="field-list compact-list">
    136. 

  136.                 <li><code>send</code> — <span data-i18n="api.auth.send">send messages with POST /api/send</span></li>
    137. 

  137.                 <li><code>mailboxes:read</code> — <span data-i18n="api.auth.read">list mailboxes with GET /api/mailboxes</span></li>
    138. 

  138.                 <li><code>mailboxes:write</code> — <span data-i18n="api.auth.write">create mailboxes with POST /api/mailboxes</span></li>
    139. 

  139.                 <li><code>messages:read</code> — <span data-i18n="api.auth.messages">read inbound messages with GET /api/inbound-messages</span></li>
    140. 

  140.               </ul>
    141. 

  141.             </article>
    142. 

  142.             <article class="card">
    143. 

  143.               <h3 data-i18n="api.send.title">Send a message</h3>
    144. 

  144.               <p data-i18n="api.send.body">The From domain must belong to the token account. When verified sending is enabled, complete the domain DNS checks before sending.</p>
    145. 

  145.               <p class="note compact-note"><code>Authorization: Bearer &lt;USER_API_TOKEN&gt;</code></p>
    146. 

  146.             </article>
    147. 

  147.           </div>
    148. 

  148.           <div class="code-card">
    149. 

  149.             <div class="code-card-bar">
    150. 

  150.               <span>POST /api/send</span>
    151. 

  151.               <button type="button" class="copy-btn" data-copy-target="api-curl" data-i18n="common.copy">Copy</button>
    152. 

  152.             </div>
    153. 

  153.             <pre id="api-curl"><code data-i18n-html="api.curl"></code></pre>
    154. 

  154.           </div>
    155. 

  155.           <div class="table-wrap">
    156. 

  156.             <table>
    157. 

  157.               <thead>
    158. 

  158.                 <tr>
    159. 

  159.                   <th data-i18n="api.fields.name">Field</th>
    160. 

  160.                   <th data-i18n="api.fields.required">Required</th>
    161. 

  161.                   <th data-i18n="api.fields.description">Description</th>
    162. 

  162.                 </tr>
    163. 

  163.               </thead>
    164. 

  164.               <tbody>
    165. 

  165.                 <tr><td><code>from</code></td><td data-i18n="common.yes">Yes</td><td data-i18n="api.field.from">sender address on an account-owned domain</td></tr>
    166. 

  166.                 <tr><td><code>to</code></td><td data-i18n="common.yes">Yes</td><td data-i18n="api.field.to">recipient string or an address array</td></tr>
    167. 

  167.                 <tr><td><code>subject</code></td><td data-i18n="common.no">No</td><td data-i18n="api.field.subject">defaults to (no subject)</td></tr>
    168. 

  168.                 <tr><td><code>text</code></td><td data-i18n="common.no">No</td><td data-i18n="api.field.text">plain-text body</td></tr>
    169. 

  169.                 <tr><td><code>html</code></td><td data-i18n="common.no">No</td><td data-i18n="api.field.html">HTML body; required when enabling open or click tracking</td></tr>
    170. 

  170.                 <tr><td><code>tracking</code></td><td data-i18n="common.no">No</td><td data-i18n="api.field.tracking">true/false, or { opens, clicks }; rewrites HTML only</td></tr>
    171. 

  171.                 <tr><td><code>smtpRelayId</code></td><td data-i18n="common.no">No</td><td data-i18n="api.field.relay">an account-owned outbound SMTP relay ID</td></tr>
    172. 

  172.               </tbody>
    173. 

  173.             </table>
    174. 

  174.           </div>
    175. 

  175.           <div class="code-card doc-code-card">
    176. 

  176.             <div class="code-card-bar"><span data-i18n="api.responseLabel">202 response</span></div>
    177. 

  177.             <pre><code data-i18n-html="api.response"></code></pre>
    178. 

  178.           </div>
    179. 

  179.           <p class="note" data-i18n="api.note">A 202 response means MailHub accepted the message for SMTP delivery. Use the console delivery log or webhooks to observe the later result.</p>
    180. 

  180.         </section>
    181. 

  181. 

  182.         <section id="mailboxes" class="section section-alt">
    183. 

  183.           <div class="section-head">
    184. 

  184.             <h2 data-i18n="mailboxes.title">Mailbox API and clients</h2>
    185. 

  185.             <p data-i18n="mailboxes.sub">Create a persistent address for ongoing work, or an expiring address for a short-lived workflow.</p>
    186. 

  186.           </div>
    187. 

  187.           <div class="doc-grid">
    188. 

  188.             <article class="card">
    189. 

  189.               <h3 data-i18n="mailboxes.api.title">Mailbox API scope</h3>
    190. 

  190.               <p data-i18n="mailboxes.api.body">POST /api/mailboxes requires mailboxes:write. The target domain must belong to the token account.</p>
    191. 

  191.               <ul class="field-list compact-list">
    192. 

  192.                 <li><code>mode</code> — <span data-i18n="mailboxes.api.mode">permanent or temporary</span></li>
    193. 

  193.                 <li><code>address</code> / <code>domain</code> — <span data-i18n="mailboxes.api.address">use a full address, or choose domain plus localPart</span></li>
    194. 

  194.                 <li><code>expiresInMinutes</code> — <span data-i18n="mailboxes.api.expires">required for temporary mailboxes; 5 minutes to 30 days</span></li>
    195. 

  195.                 <li><code>password</code> — <span data-i18n="mailboxes.api.password">optional; a secure password is returned once when omitted</span></li>
    196. 

  196.               </ul>
    197. 

  197.             </article>
    198. 

  198.             <article class="card">
    199. 

  199.               <h3 data-i18n="mailboxes.client.title">Use the returned configuration</h3>
    200. 

  200.               <p data-i18n="mailboxes.client.body">Creation returns the address, password, expiration, and ready-to-use IMAP, POP3, and SMTP settings.</p>
    201. 

  201.               <ul class="field-list compact-list">
    202. 

  202.                 <li><strong>IMAP</strong> — <span data-i18n="mailboxes.client.imap">recommended for synchronized folders and sent mail</span></li>
    203. 

  203.                 <li><strong>POP3</strong> — <span data-i18n="mailboxes.client.pop3">for download-oriented clients</span></li>
    204. 

  204.                 <li><strong>SMTP</strong> — <span data-i18n="mailboxes.client.smtp">use the same full mailbox address and password to send</span></li>
    205. 

  205.               </ul>
    206. 

  206.             </article>
    207. 

  207.           </div>
    208. 

  208.           <div class="reference-grid">
    209. 

  209.             <div class="code-card doc-code-card">
    210. 

  210.               <div class="code-card-bar"><span data-i18n="mailboxes.permanent.label">POST /api/mailboxes - permanent</span><button type="button" class="copy-btn" data-copy-target="mailbox-permanent-curl" data-i18n="common.copy">Copy</button></div>
    211. 

  211.               <pre id="mailbox-permanent-curl"><code data-i18n-html="mailboxes.permanent.curl"></code></pre>
    212. 

  212.             </div>
    213. 

  213.             <div class="code-card doc-code-card">
    214. 

  214.               <div class="code-card-bar"><span data-i18n="mailboxes.temporary.label">POST /api/mailboxes - temporary</span><button type="button" class="copy-btn" data-copy-target="mailbox-temporary-curl" data-i18n="common.copy">Copy</button></div>
    215. 

  215.               <pre id="mailbox-temporary-curl"><code data-i18n-html="mailboxes.temporary.curl"></code></pre>
    216. 

  216.             </div>
    217. 

  217.           </div>
    218. 

  218.           <div class="code-card doc-code-card">
    219. 

  219.             <div class="code-card-bar"><span>GET /api/mailboxes</span><button type="button" class="copy-btn" data-copy-target="mailbox-list-curl" data-i18n="common.copy">Copy</button></div>
    220. 

  220.             <pre id="mailbox-list-curl"><code data-i18n-html="mailboxes.list.curl"></code></pre>
    221. 

  221.           </div>
    222. 

  222.           <div class="code-card doc-code-card">
    223. 

  223.             <div class="code-card-bar"><span data-i18n="mailboxes.responseLabel">201 creation response</span></div>
    224. 

  224.             <pre><code data-i18n-html="mailboxes.response"></code></pre>
    225. 

  225.           </div>
    226. 

  226.           <ul class="field-list">
    227. 

  227.             <li data-i18n="mailboxes.lifecycle.password">The returned password is the only opportunity to read an automatically generated password.</li>
    228. 

  228.             <li data-i18n="mailboxes.lifecycle.temporary">A temporary mailbox expires after the requested interval and then stops receiving mail and authenticating.</li>
    229. 

  229.             <li data-i18n="mailboxes.lifecycle.list">Use mailboxes:read to list mailbox metadata; passwords are never returned by the list endpoint.</li>
    230. 

  230.           </ul>
    231. 

  231.         </section>
    232. 

  232. 

  233.         <section id="receiving" class="section">
    234. 

  234.           <div class="section-head">
    235. 

  235.             <h2 data-i18n="receiving.title">Receiving mail</h2>
    236. 

  236.             <p data-i18n="receiving.sub">Mail arrives through the domain MX record. Read it in MailHub Inbox, through IMAP/POP3, or with a scoped Bearer token.</p>
    237. 

  237.           </div>
    238. 

  238.           <div class="reference-grid">
    239. 

  239.             <div class="code-card doc-code-card">
    240. 

  240.               <div class="code-card-bar"><span data-i18n="receiving.list.label">GET /api/inbound-messages - list</span><button type="button" class="copy-btn" data-copy-target="inbound-list-curl" data-i18n="common.copy">Copy</button></div>
    241. 

  241.               <pre id="inbound-list-curl"><code data-i18n-html="receiving.list.curl"></code></pre>
    242. 

  242.             </div>
    243. 

  243.             <div class="code-card doc-code-card">
    244. 

  244.               <div class="code-card-bar"><span data-i18n="receiving.detail.label">GET /api/inbound-messages/:id - detail</span><button type="button" class="copy-btn" data-copy-target="inbound-detail-curl" data-i18n="common.copy">Copy</button></div>
    245. 

  245.               <pre id="inbound-detail-curl"><code data-i18n-html="receiving.detail.curl"></code></pre>
    246. 

  246.             </div>
    247. 

  247.           </div>
    248. 

  248.           <p class="note" data-i18n="receiving.api.note">Inbound APIs require messages:read and are limited by the token mailbox access setting. Only administrator tokens explicitly set to all mailboxes can read across accounts.</p>
    249. 

  249.           <div class="doc-grid">
    250. 

  250.             <article class="card">
    251. 

  251.               <h3 data-i18n="receiving.delivery.title">Inbound delivery</h3>
    252. 

  252.               <p data-i18n="receiving.delivery.body">Set the domain MX record to the receiving host. External mail servers then deliver to SMTP port 25, and MailHub stores mail for an existing mailbox, alias, or catch-all target.</p>
    253. 

  253.             </article>
    254. 

  254.             <article class="card">
    255. 

  255.               <h3 data-i18n="receiving.routing.title">Mailbox, aliases, and catch-all</h3>
    256. 

  256.               <p data-i18n="receiving.routing.body">Create a full mailbox address first. Add aliases or forwarding on that mailbox, and configure the domain catch-all in the console to route unknown local parts to a mailbox or another address.</p>
    257. 

  257.             </article>
    258. 

  258.           </div>
    259. 

  259.           <div class="table-wrap">
    260. 

  260.             <table>
    261. 

  261.               <thead>
    262. 

  262.                 <tr>
    263. 

  263.                   <th data-i18n="receiving.protocols.protocol">Protocol</th>
    264. 

  264.                   <th data-i18n="receiving.protocols.ports">Recommended ports</th>
    265. 

  265.                   <th data-i18n="receiving.protocols.security">Security</th>
    266. 

  266.                   <th data-i18n="receiving.protocols.use">Use</th>
    267. 

  267.                 </tr>
    268. 

  268.               </thead>
    269. 

  269.               <tbody>
    270. 

  270.                 <tr><td>IMAP</td><td><code>993</code> / <code>143</code></td><td data-i18n="receiving.protocols.imapSecurity">SSL/TLS or STARTTLS</td><td data-i18n="receiving.protocols.imapUse">recommended for synchronized folders</td></tr>
    271. 

  271.                 <tr><td>POP3</td><td><code>995</code> / <code>110</code></td><td data-i18n="receiving.protocols.pop3Security">SSL/TLS or STLS</td><td data-i18n="receiving.protocols.pop3Use">download-oriented clients</td></tr>
    272. 

  272.                 <tr><td>SMTP</td><td><code>465</code> / <code>587</code></td><td data-i18n="receiving.protocols.smtpSecurity">SMTPS or STARTTLS</td><td data-i18n="receiving.protocols.smtpUse">send with the same mailbox address and password</td></tr>
    273. 

  273.               </tbody>
    274. 

  274.             </table>
    275. 

  275.           </div>
    276. 

  276.           <p class="note" data-i18n="receiving.folders">IMAP exposes INBOX, Sent, Drafts, Trash, Junk, and Archive. Use IMAP when the client should synchronize these folders and save sent messages.</p>
    277. 

  277.         </section>
    278. 

  278. 

  279.         <section id="domains" class="section">
    280. 

  280.           <div class="section-head">
    281. 

  281.             <h2 data-i18n="domainsDoc.title">Domain configuration</h2>
    282. 

  282.             <p data-i18n="domainsDoc.sub">Create the domain in MailHub first. Its DNS panel is the source of truth for your exact verification, DKIM, SPF, DMARC, and sender-host values.</p>
    283. 

  283.           </div>
    284. 

  284.           <div class="table-wrap">
    285. 

  285.             <table>
    286. 

  286.               <thead>
    287. 

  287.                 <tr>
    288. 

  288.                   <th data-i18n="domainsDoc.col.purpose">Purpose</th>
    289. 

  289.                   <th data-i18n="domainsDoc.col.record">Record</th>
    290. 

  290.                   <th data-i18n="domainsDoc.col.requirement">Requirement</th>
    291. 

  291.                 </tr>
    292. 

  292.               </thead>
    293. 

  293.               <tbody>
    294. 

  294.                 <tr><td data-i18n="domainsDoc.row.verify">Domain ownership</td><td><code>TXT _mailhub.&lt;domain&gt;</code></td><td data-i18n="domainsDoc.row.verifyValue">Publish the verification value generated in the console.</td></tr>
    295. 

  295.                 <tr><td>DKIM</td><td><code>TXT &lt;selector&gt;._domainkey.&lt;domain&gt;</code></td><td data-i18n="domainsDoc.row.dkim">Publish the public key generated for this domain.</td></tr>
    296. 

  296.                 <tr><td>SPF</td><td><code>TXT &lt;domain&gt;</code></td><td data-i18n="domainsDoc.row.spf">Keep one SPF record and include the sender IP/host required by MailHub.</td></tr>
    297. 

  297.                 <tr><td>DMARC</td><td><code>TXT _dmarc.&lt;domain&gt;</code></td><td data-i18n="domainsDoc.row.dmarc">Start with monitoring, then strengthen the policy after alignment is verified.</td></tr>
    298. 

  298.                 <tr><td data-i18n="domainsDoc.row.mx">Inbound mail</td><td><code>MX &lt;domain&gt;</code></td><td data-i18n="domainsDoc.row.mxValue">Point MX to the MailHub receiving host and ensure that host has an A/AAAA record.</td></tr>
    299. 

  299.               </tbody>
    300. 

  300.             </table>
    301. 

  301.           </div>
    302. 

  302.           <p class="note" data-i18n="domainsDoc.note">For reliable delivery, also configure the sending IP's PTR to match the MailHub sending hostname and allow the documented SMTP, IMAP, and POP3 ports through your firewall.</p>
    303. 

  303.         </section>
    304. 

  304. 

  305.         <section id="smtp" class="section section-alt">
    306. 

  306.           <div class="section-head">
    307. 

  307.             <h2 data-i18n="smtp.title">SMTP submission</h2>
    308. 

  308.             <p data-i18n="smtp.sub">Default listener ports (override in your deployment):</p>
    309. 

  309.           </div>
    310. 

  310.           <div class="port-grid">
    311. 

  311.             <div class="card mono"><strong>25</strong><span>smtp</span></div>
    312. 

  312.             <div class="card mono"><strong>587</strong><span>smtp / STARTTLS</span></div>
    313. 

  313.             <div class="card mono"><strong>465</strong><span>smtps</span></div>
    314. 

  314.             <div class="card mono"><strong>2525</strong><span>smtp</span></div>
    315. 

  315.           </div>
    316. 

  316.           <div class="doc-grid">
    317. 

  317.             <article class="card"><h3 data-i18n="smtp.app.title">Application SMTP</h3><p data-i18n="smtp.app.body">Create an SMTP login credential in the console for an application. Use that credential with an account-owned From domain.</p></article>
    318. 

  318.             <article class="card"><h3 data-i18n="smtp.mailbox.title">Mailbox SMTP</h3><p data-i18n="smtp.mailbox.body">A created mailbox can also authenticate over SMTP with its full email address and password. Use the same credentials for IMAP or POP3.</p></article>
    319. 

  319.           </div>
    320. 

  320.           <p class="note" data-i18n="smtp.note">Prefer 465 or 587 for sending, 993 for IMAP, and 995 for POP3. The creation response is the source of truth when a deployment overrides default ports or TLS listeners.</p>
    321. 

  321.         </section>
    322. 

  322. 

  323.         <section id="errors" class="section">
    324. 

  324.           <div class="section-head">
    325. 

  325.             <h2 data-i18n="errors.title">Responses and common errors</h2>
    326. 

  326.             <p data-i18n="errors.sub">The API returns JSON. Validate the HTTP status before consuming a response body.</p>
    327. 

  327.           </div>
    328. 

  328.           <div class="table-wrap">
    329. 

  329.             <table>
    330. 

  330.               <thead><tr><th data-i18n="errors.status">Status</th><th data-i18n="errors.meaning">Meaning</th><th data-i18n="errors.action">What to do</th></tr></thead>
    331. 

  331.               <tbody>
    332. 

  332.                 <tr><td><code>201</code></td><td data-i18n="errors.201.meaning">Mailbox created</td><td data-i18n="errors.201.action">Store the one-time password and clientConfig.</td></tr>
    333. 

  333.                 <tr><td><code>202</code></td><td data-i18n="errors.202.meaning">Message accepted for SMTP delivery</td><td data-i18n="errors.202.action">Inspect delivery logs or webhooks for later delivery status.</td></tr>
    334. 

  334.                 <tr><td><code>400</code></td><td data-i18n="errors.400.meaning">Invalid request or domain ownership rule</td><td data-i18n="errors.400.action">Read the JSON error and correct the request body or domain setup.</td></tr>
    335. 

  335.                 <tr><td><code>401</code></td><td data-i18n="errors.401.meaning">Missing, invalid, revoked, or expired token</td><td data-i18n="errors.401.action">Create or rotate a valid token.</td></tr>
    336. 

  336.                 <tr><td><code>403</code></td><td data-i18n="errors.403.meaning">Token does not have the required scope</td><td data-i18n="errors.403.action">Grant the minimum required scope in Console &gt; API Tokens.</td></tr>
    337. 

  337.                 <tr><td><code>409</code></td><td data-i18n="errors.409.meaning">Mailbox address already exists</td><td data-i18n="errors.409.action">Choose another address or use the existing mailbox.</td></tr>
    338. 

  338.               </tbody>
    339. 

  339.             </table>
    340. 

  340.           </div>
    341. 

  341.         </section>
    342. 

  342. 

  343.         <section id="webhooks" class="section">
    344. 

  344.           <div class="section-head">
    345. 

  345.             <h2 data-i18n="webhooks.title">Delivery webhooks</h2>
    346. 

  346.             <p data-i18n="webhooks.sub">Terminal events only — signed HTTPS callbacks to your systems.</p>
    347. 

  347.           </div>
    348. 

  348.           <div class="table-wrap">
    349. 

  349.             <table>
    350. 

  350.               <thead>
    351. 

  351.                 <tr>
    352. 

  352.                   <th data-i18n="webhooks.col.status">Status</th>
    353. 

  353.                   <th data-i18n="webhooks.col.type">type</th>
    354. 

  354.                 </tr>
    355. 

  355.               </thead>
    356. 

  356.               <tbody>
    357. 

  357.                 <tr><td><code>sent</code></td><td><code>email.sent</code></td></tr>
    358. 

  358.                 <tr><td><code>bounced</code></td><td><code>email.bounced</code></td></tr>
    359. 

  359.                 <tr><td><code>failed</code></td><td><code>email.failed</code></td></tr>
    360. 

  360.               </tbody>
    361. 

  361.             </table>
    362. 

  362.           </div>
    363. 

  363.           <p class="note"><span data-i18n="webhooks.sig">Signature header:</span> <code>X-MailHub-Signature: t=&lt;unix&gt;,v1=&lt;hmac&gt;</code></p>
    364. 

  364.         </section>
    365. 

  365. 

  366.         <section class="section cta-band">
    367. 

  367.           <h2 data-i18n="ctaBand.title">Ready to send?</h2>
    368. 

  368.           <p data-i18n="ctaBand.sub">Create an account, add a domain, and ship your first message in minutes.</p>
    369. 

  369.           <div class="hero-cta">
    370. 

  370.             <a class="btn btn-primary btn-lg" href="/register" data-i18n="cta.signup">Get started</a>
    371. 

  371.             <a class="btn btn-ghost btn-lg" href="/login" data-i18n="cta.login">Log in</a>
    372. 

  372.           </div>
    373. 

  373.         </section>
    374. 

  374.       </main>
    375. 

  375. 

  376.       <footer class="site-footer">
    377. 

  377.         <div>
    378. 

  378.           <strong>MailHub</strong>
    379. 

  379.           <span data-i18n="footer.tag">Self-hosted email delivery control plane</span>
    380. 

  380.         </div>
    381. 

  381.         <div class="footer-links">
    382. 

  382.           <a
    383. 

  383.             href="https://github.com/chendeben/MailHub"
    384. 

  384.             target="_blank"
    385. 

  385.             rel="noopener noreferrer"
    386. 

  386.             data-i18n="cta.github"
    387. 

  387.           >GitHub</a>
    388. 

  388.           <a href="/login" data-i18n="cta.login">Log in</a>
    389. 

  389.           <a href="/register" data-i18n="cta.signup">Get started</a>
    390. 

  390.         </div>
    391. 

  391.       </footer>
    392. 

  392.     </div>
    393. 

  393.   </body>
    394. 

  394. </html>
    395.