Setting up a virtual Postfix mail server — Part 4: Setting up a Sender Rewriting Scheme (SRS)

Setting up a virtual Postfix mail server — Part 4: Setting up a Sender Rewriting Scheme (SRS)

In the previous part of this tutorial series, we set up DKIM, DMARC and rDNS on mail server to make emails from our mail server more deliverable, as these protocols make it less likely that other mailboxes will flag our emails as spam.

With that set up, we can now turn our attention to something else. Currently, any incoming mail to one of your domain emails will fail the SPF check for the domain.

Gmail SPF Softfail
To see this, you will have to view the email's message source. You can do that with most mail clients; here's how to do it for Gmail.
  1. Why SPF fails for incoming emails
  2. Installing and configuring PostSRSd
    1. Installing PostSRSd
    2. Configuring PostSRSd
  3. Configuring Postfix
  4. Starting PostSRSd
  5. Conclusion
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