Created attachment 609975 [details]
main.cf mods caused by yast2 network

After a long time, I used yast2-network to change something in the network
configuration of my node. (Changed the hostname.)

As a result, my postfix main.cf was overwritten and rendered unusuable. I'm
entirely unsure why some of these parameters were touched - why would it unset
mailbox_command, set mailbox_transport, unset relay_host?

Yes, this was facilitated by me having
/etc/sysconfig/mail:MAIL_CREATE_CONFIG="yes" at the default value, but
normally, none of the yast2 tools overwrites manually modified files silently,
without even creating an in-place backup.

Especially since this looks as if unrelated parameters were touched. I might
have understood rewriting "mydestination", but the other parameters make
absolutely no sense.

I'm attaching the diff here - I restored the main.cf from backup.