Comment 7 for bug 1916541

Hi Eugene,

I could reproduce the issue from a clean Hirsute VM. Steps:

1. lxc launch ubuntu-daily:hirsute paride-h-vm --vm
2. lxc exec paride-h-vm bash
3. apt update
4. apt full-upgrade
5. apt install postfix
   # Debconf config as: Satellite system.
   # All the rest left with default values
6. apt install bsd-mailx
7. echo x | mailx <email address hidden>
8. mailq. Check the "unknown mail transport error":

-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
3D4CB3F4DB 370 Thu Feb 25 13:52:53 <email address hidden>
                                                (unknown mail transport error)
                                         <email address hidden>

9. cat /var/log/mail.log. There it is:

Feb 25 13:52:53 paride-h-vm postfix/smtp[10307]: fatal: unknown service: smtp/tcp

I'm not sure if this should be considered a postfix bug or a glibc bug at this point. If this is a regression caused by a recent glibc upload then other packages may be affected, and action should be taken on that side.

I'm adding a "glibc" task to get attention from the glibc maintainers, and raising the importance of this bug. Thanks a lot for sharing all the details of your debugging work!