Install srs by entering the following commands in the terminal:
sudo apt update sudo apt install srs
Description:
command-line Sender Rewriting Scheme client
The Sender Rewriting Scheme preserves .forward functionality in an SPF-compliant world. . SPF requires the SMTP client IP to match the envelope sender (return-path). When a message is forwarded through an intermediate server, that intermediate server may need to rewrite the return-path to remain SPF compliant. If the message bounces, that intermediate server needs to validate the bounce and forward the bounce to the original sender. . This package contains the srs client that can be used in your .forward files.
Homepage: https://metacpan.org/release/Mail-SRS
Version: 0.31-6
Section: universe/mail