References
- https://github.com/roehling/postsrsd
- https://github.com/zoni/postforward
- Mail in 2012 from an admin’s perspective. By Luuk Hendriks on September 10th, 2012
- SRS / Sender Rewriting when forwarding mail through postfix
- Postfix: forwarding e-mail to GMail not working
Sender Rewriting Scheme (SRS)