Feature Request: Support local Maildir / directory parsing as alternative to IMAP

[gajanak]

Hello,

First of all, thank you for this awesome and lightweight tool!

I am currently running dmarcguard on the same server that hosts my mail server (Postfix/Courier). Because of this setup, the tool has direct filesystem access to the Maildir where the DMARC reports land.

Instead of configuring a local IMAP connection (which adds unnecessary overhead and credential management),
it would be amazing if dmarcguard could natively parse a local Maildir folder.

Proposed Solution / Use Case:

• Introduce a new configuration variable (e.g., MAILDIR_PATH=/var/mail/dmarc/Maildir).
• If this path is set, the background worker polls the local directory (reading files from new/ and moving them to cur/) instead of connecting via IMAP.
• There are already well-maintained Go libraries for this (like github.com/emersion/go-maildir), which would keep the binary lightweight.

Questions to the Author & Community:

• Is there general interest in such a feature, or has anyone already worked on a similar approach?
• Are there any architectural blockers or design principles in this project that would speak against adding local directory/Maildir support?

If there is interest and no major architectural blockers, I am also considering forking the project to look into implementing this myself.
(But I don't touch Go Code for 10 Years ;)

Thanks for your time and feedback!
Best regards

[meysam81]

hey @gajanak

thanks for your interest and for a detailed issue

I'm currently quite tied up handling the SaaS. you're welcome to try it out for free. https://dmarcguard.io

if that's not an option for you, you're welcome to contribute to the project so that people like yourself can benefit from the work.

meysam