https://www.pistack.xyz/tags/srs/ Recent content in Srs on Pi Stack Hugo en-us Sat, 16 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-16-self-hosted-smtp-srs-postsrsd-exim-haraka-guide/ Sat, 16 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-16-self-hosted-smtp-srs-postsrsd-exim-haraka-guide/ <p>Email forwarding is a fundamental feature of mail server infrastructure — whether you&rsquo;re running a catch-all domain, forwarding mail between providers, or managing mailing lists. But when you forward an email, the envelope sender (Return-Path) still points to the original sender&rsquo;s domain. This breaks SPF (Sender Policy Framework) validation at the final destination, causing forwarded emails to fail authentication and land in spam folders.</p>