Implementation quirks

This page documents unusual behavior of the maddy protocols implementations. Some of these problems break standards, some don't but still can hurt interoperability.

SMTP

for field is never included in the Received header field.

This is allowed by RFC 2821.

IMAP

`sql`

\Recent flag is not reset in all cases.

This does not break RFC 3501. Clients relying on it will work (much) less efficiently.

Frequently Asked Questions
Tutorials
Release builds
Multiple domains configuration
Upgrading from older maddy versions
Outbound delivery security
Docker
Reference manual
- Modules introduction
- Global configuration directives
- TLS configuration
- Automatic certificate management via ACME
- Endpoints configuration
- IMAP storage
  - IMAP filters
  - SQL-indexed storage
  - Blob storage
    - Filesystem
    - Amazon S3
- SMTP message routing (pipeline)
- SMTP targets
- SMTP checks
- SMTP modifiers
  - DKIM signing
  - Envelope sender / recipient rewriting
- Lookup tables (string translation)
- Authentication providers
- Configuration files syntax
Integration with software
Internals