_ _                                      
                 (_) |                                     
  _ __ ___   __ _ _| |_   _____ _   _  __ _ _ __   ___ ___ 
 | '_ ` _ \ / _` | | \ \ / / _ \ | | |/ _` | '_ \ / __/ _ \
 | | | | | | (_| | | |\ V /  __/ |_| | (_| | | | | (_|  __/
 |_| |_| |_|\__,_|_|_| \_/ \___|\__, |\__,_|_| |_|\___\___|
                                 __/ |                     
                                |___/                      

Mailveyance is an email forwarding service.

It takes E-mails from a custom domain and sends them to a a webhook, S3-compatible storage, or a Discord webhook.

How it works

Set an MX record to mx.mailveyance.org, add your domain, and set up forwarding.

e.g. .* matches everything, abuse matches abuse@yourdomain.com. It uses the RE2 regex engine.

Examples

• abuse@example.com → Your abuse endpoint
• invoices@example.com → Parse a PDF and attach it to your accounting software of choice
• copyright@example.com → Intake a copyright claim and send it to your moderation department
• rsvp@example.com → Send back a calendar invite (.ics)
• deploy@example.com → Deploy your website
• backup@example.com → Start a backup

Knowing something came from us

You can check to see if a webhook came from us by checking the X-Mailveyance-Signature header.

It is calculated using hmac_sha256(pre_shared_key, message_payload)

• pre_shared_key is in your account settings (per account)
• message_payload is the payload body

Payload format

{
  "attachments": [],
  "headers": {},
  "headerLines": [
    {
      "key": "received",
      "line": "Received: from davids-macbook-air.local (unknown [192.168.164.1])\r\n\tby mta.axostichus.org (Postfix) with ESMTP id CA95AC0E28\r\n\tfor <test@axostichus.org>; Tue, 03 Mar 2026 01:55:13 +0000 (UTC)"
    },
    {
      "key": "date",
      "line": "Date: Mon, 02 Mar 2026 20:55:13 -0500"
    },
    {
      "key": "to",
      "line": "To: test@axostichus.org"
    },
    {
      "key": "from",
      "line": "From: david@davids-macbook-air.local"
    },
    {
      "key": "subject",
      "line": "Subject: test Mon, 02 Mar 2026 20:55:13 -0500"
    },
    {
      "key": "message-id",
      "line": "Message-Id: <20260302205513.058347@davids-macbook-air.local>"
    },
    {
      "key": "x-mailer",
      "line": "X-Mailer: swaks v20240103.0 jetmore.org/john/code/swaks/"
    }
  ],
  "text": "This is a test mailing\n\n\n",
  "textAsHtml": "<p>This is a test mailing</p>",
  "subject": "test Mon, 02 Mar 2026 20:55:13 -0500",
  "date": "2026-03-03T01:55:13.000Z",
  "to": {
    "value": [
      {
        "address": "test@axostichus.org",
        "name": ""
      }
    ],
    "html": "<span class=\"mp_address_group\"><a href=\"mailto:test@axostichus.org\" class=\"mp_address_email\">test@axostichus.org</a></span>",
    "text": "test@axostichus.org"
  },
  "from": {
    "value": [
      {
        "address": "david@davids-macbook-air.local",
        "name": ""
      }
    ],
    "html": "<span class=\"mp_address_group\"><a href=\"mailto:david@davids-macbook-air.local\" class=\"mp_address_email\">david@davids-macbook-air.local</a></span>",
    "text": "david@davids-macbook-air.local"
  },
  "messageId": "<20260302205513.058347@davids-macbook-air.local>",
  "html": false
}

Migration guide

• From ForwardEmail.net: No big changes, but the X-Webhook-Signature header should be changed to X-Mailveyance-Signature. The payload is the same.
• ImprovMX: You'll need to restructure the E-mail payload entirely. See above for an example.

Get Started

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Privacy Policy

• Subprocessors:
  • Contabo GmbH: E-mail server and dashboard hosting (this service)
  • Ahasend B.V.: Transactional E-mail to login into your account.
• Data collection of E-mails: We collect your E-mails (RFC 5322) and send them to your designated endpoint. They are deleted instantly after a successful upload (200 OK/S3 upload) or after 3 days of retries.
• Data collection from you: We require an E-mail to login to our service.
• Your rights: You have the right to be informed, right of access, right to rectification, right to erasure (right to be forgotten), right to restrict processing, right to data portability, right to object, and you have rights related to automated decision-making and profiling.
• If something is in not in this privacy policy, we don't do it.

Terms of Use

By using Mailveyance, you agree to not:

• use the service for discriminatory content, including racism, homophobia, transphobia, or bigotry based on race, ethnicity, religion, gender, sexual orientation, disability, or other protected characteristics;
• use the service to conduct spam or attacks against other services;
• violate the laws of the United States or the Federal Republic of Germany; or
• use the service as a temporary email address service or to create such a service.
  • For purposes of this agreement, a "temporary email address service" means any system, platform, or tool that provides users with disposable, ephemeral, or short-lived email addresses primarily intended to receive verification emails, bypass registration requirements, or conceal the user's true identity when signing up for other online services

To the fullest extent allowed by law, Mailveyance and its operators will not be held liable for indirect, incidental, or consequential damages, lost data, profits, or revenue arising from your use, or inability to use, the Service, unauthorized access to your content, or the conduct of others.

End of terms.