📝 Preliminary Checks

• I tried searching for an existing issue and followed the debugging docs advice, but still need assistance.
• I will disclose any AI assistance I have used with the information I provide in my report, so that I do not waste the time of humans trying to help me.

👀 What Happened?

• Issue: DKIM fails at Gmail for Epic/Zeta messages while passing locally; DMARC fails consequently.
• Symptom: Gmail “Show original” reports dkim=fail for both selectors and dmarc=fail; Gmail copy lacks two signed headers.
• Troubleshooting steps: Held outbound message (/tmp/epic.clean.lf), verified with opendkim-testmsg; captured Gmail copy (/tmp/epic.gmail.eml); normalized/diffed headers and bodies; computed body hashes.
• Findings: Local copy passes DKIM; body hash matches DKIM bh, so body unchanged; Gmail copy removed signed headers X-Mailer-Info and X-Mailer-Info-Extra (both present in h=), causing DKIM to fail; ARC i=1 on receipt shows DKIM pass, ARC i=2 at Gmail shows DKIM fail; SPF aligns to SRS domain (my domain), so without DKIM, DMARC fails.

👟 Reproduction Steps

Set up email forwarding to Gmail and have epicgames.com send an email.

It appears that this is responsible for removing the headers causing DKIM to fail:

🐋 DMS Version

v15.1.0

💻 Operating System and Architecture

Ubuntu

⚙️ Container configuration files

📜 Relevant log output