I was looking into bug #1998678 as a potential reason, do you see any concerning logs in your /var/log/exim4/mainlog (or wherever your logs are)?
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2056372 Title: Enabling SPF checks with CHECK_RCPT_SPF doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/exim4/+bug/2056372/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
