Thank you for taking the time to file a bug report. I tried to reproduce your bug in a Ubuntu Hirsute container without success. Moreover, I looked for an upstream bug report about any incompatibility with glibc 2.33 but found nothing. Could you please share your postfix config file to help us understand what is going on here?
Since there is not enough information in your report to begin triage or to differentiate between a local configuration problem and a bug in Ubuntu, I am marking this bug as "Incomplete". We would be grateful if you would: provide a more complete description of the problem, explain why you believe this is a bug in Ubuntu rather than a problem specific to your system, and then change the bug status back to "New". For local configuration issues, you can find assistance here: http://www.ubuntu.com/support/community ** Changed in: postfix (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1916541 Title: smtp "fatal: unknown service: smtp/tcp", probably after libc upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1916541/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs