Test your email deliverability from a script (and fail the build when SPF or DKIM breaks)

Last spring a transactional template that had passed every review for two years started landing in spam at Gmail. Nobody had touched it. What had changed was the sending platform: the team migrated to a new relay, the platform signed with its own DKIM domain by default, and the DMARC alignment that used to hold quietly stopped holding. It took... Weiterlesen