Description
Mail forwarding systems can rewrite sender addresses with SRS so forwarded messages survive SPF checks.
This supporting library is mainly used by mail software such as Exim. It helps generate and verify Sender Rewriting Scheme addresses, which is important when forwarding email from domains protected by SPF.
It does not configure mail forwarding by itself. Correct mail-server settings, DNS records, secrets, and logging determine whether SRS works safely.