Dewmail
Dewmail is an open-source email parsing microservice that turns incoming mail into JSON-encoded POST requests to an API.
What Dewmail is
Dewmail is an open-source email parsing microservice that turns incoming mail into JSON-encoded POST requests to an API. It receives email for a domain, parses message details and forwards fields such as the body, sender, subject, timestamp, recipient, sender IP and SPF result. Its routing example maps an address such as [email protected] to a request at api.example.com/foo/bar. The hosted setup guide directs users to point their domain’s MX records to in1.dewmail.org and in2.dewmail.org; the homepage says this service requires no signup, credit card or installation. Dewmail can also run on your own hardware or inside your network. The project is written in Go, and its source is available under the MIT License. For self-hosting, HTTPS POSTs, SPF checks and domain restrictions are configurable; HTTP is the default, and SPF and domain checks are off by default. The self-hosting instructions require port 25 to be open through the firewall.
Good
- Forwards parsed email data as JSON POST requests
- Hosted service needs no signup or installation
- Can be self-hosted under the MIT License
- HTTPS and SPF checks are configurable
Watch out
- Self-hosting requires port 25 to be open
- HTTP is the default for forwarded requests
- SPF and domain checks are disabled by default
Who it suits
Dewmail suits developers who want to add an email entry point to an existing API. It offers a hosted option as well as self-hosting for those who want to run it on their own hardware or network.
Verdict
Dewmail provides a focused bridge from incoming email to API requests, with hosted and self-hosted setups. Self-hosters should account for the port 25 requirement and review the default transport and checks.
The facts
Each one read from Dewmail's own pages, with the date it was checked.
What it does
- Address routing
- The setup example maps an address such as [email protected] to a POST at /foo/bar on api.example.com.checked 9 Oct 2026
- Configuration
- The source README documents options for valid-domain checks, the API route, HTTPS POST, and SPF checks.checked 9 Oct 2026
- Demo privacy
- The demo page says displayed emails are obfuscated so that no one gets spammed.checked 9 Oct 2026
- Domain restriction
- Self-hosted configuration can restrict accepted mail to specified valid domains; domain checking is off by default.checked 4 Oct 2026
- Email fields
- The example parsed request includes the message body, sender, subject, timestamp, recipient, sender IP, and SPF result.checked 9 Oct 2026
- Email forwarding
- It receives email for a domain and sends a JSON-encoded POST request to the API.checked 4 Oct 2026
- Hosted service access
- The homepage says the hosted service requires no signup, credit card, or installation.checked 4 Oct 2026
- Intended users
- The maker describes Dewmail as a way to add an email frontend to an existing API.checked 9 Oct 2026
- Language
- The project repository says Dewmail is written in Go.checked 4 Oct 2026
- No account required
- The maker says the hosted service requires no signup or credit card.checked 9 Oct 2026
- Operational requirement
- The self-hosting instructions say port 25 must be open through the firewall.checked 9 Oct 2026
- Parsed fields
- Its example JSON includes the message body, sender, subject, timestamp, recipient, sender IP, and SPF result.checked 4 Oct 2026
- Port requirement
- The self-hosting instructions say port 25 must not be blocked by the firewall.checked 4 Oct 2026
- Product
- Dewmail is an open-source email parsing microservice for HTTP APIs.checked 4 Oct 2026
- Recipient routing
- The setup example maps [email protected] to a POST at api.example.com/foo/bar.checked 4 Oct 2026
- Security option
- Self-hosted configuration can use HTTPS for POST requests; the repository lists HTTP as the default.checked 4 Oct 2026
- Self-hosting
- Dewmail is open source under the MIT License and can be hosted on your own hardware or inside your network.checked 9 Oct 2026
- Setup
- The hosted quick start uses two MX records and says setup takes less than 30 seconds.checked 9 Oct 2026
- SPF behavior
- The README says SPF checking and requiring an SPF pass are configurable and disabled by default.checked 9 Oct 2026
- SPF option
- SPF checking and requiring an SPF pass are configurable, and both are disabled by default.checked 4 Oct 2026
- Support
- The maker invites questions by email at [email protected] and through Twitter.checked 9 Oct 2026
- Transport default
- The README says HTTP is the default for forwarded POST requests; HTTPS can be enabled in configuration.checked 9 Oct 2026
- What it does
- Dewmail receives email for a domain, parses it, and sends a JSON-encoded POST request to an existing API.checked 9 Oct 2026
The company
- Maker
- The site credits Stephen Parker as Dewmail's maker.checked 4 Oct 2026
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