[GH-ISSUE #1440] Apply Sender Rewriting Scheme (SRS) when relaying messages #1142

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opened 2026-02-27 11:15:31 +03:00 by kerem · 0 comments

kerem commented

2026-02-27 11:15:31 +03:00

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Originally created by @jichu4n on GitHub (Mar 26, 2018).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/1440

Impacted versions

Modoboa: 1.10.3
installer used: Yes
Webserver: Nginx

Steps to reproduce

Use modoboa-installer to set up.
Add a domain and a virtual alias.

Current behavior

I noticed that with the default configuration, emails relayed via virtual aliases do not have Sender Rewriting Scheme (SRS) applied. This causes such forwarded emails to soft-fail or hard-fail SPF checks.

Expected behavior

We should rewrite the sender address of relayed emails following SRS.

I've manually configured PostSRSd in the past for this task, but was hoping that Modoboa could implement an automated way of setting this up.

Sidenote: Kudos for making such an awesome tool and sharing it with the world! I just migrated my mail server to Modoboa and was really impressed.

Originally created by @jichu4n on GitHub (Mar 26, 2018). Original GitHub issue: https://github.com/modoboa/modoboa/issues/1440 # Impacted versions * Modoboa: 1.10.3 * installer used: Yes * Webserver: Nginx # Steps to reproduce 1. Use modoboa-installer to set up. 2. Add a domain and a virtual alias. # Current behavior I noticed that with the default configuration, emails relayed via virtual aliases do not have Sender Rewriting Scheme (SRS) applied. This causes such forwarded emails to soft-fail or hard-fail SPF checks. # Expected behavior We should rewrite the sender address of relayed emails following [SRS](https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme). I've [manually configured PostSRSd](https://seasonofcode.com/posts/setting-up-dkim-and-srs-in-postfix.html#_step_2_srs) in the past for this task, but was hoping that Modoboa could implement an automated way of setting this up. Sidenote: Kudos for making such an awesome tool and sharing it with the world! I just migrated my mail server to Modoboa and was really impressed.