Public bug reported:
The postfix package distributes a main.cf configuration file that refers
to localhost in at least one of the parameter settings. Instead, it
should use localhost's IP address (127.0.0.1), because postfix might not
be able to resolve "localhost" even though it is defined in /etc/hosts.
I had this problem on my server, I gave up figuring out how to solve the
problem, and finally edited the config file and the problem went away. I
suppose it has something to do with nsswitch.conf, and whether localhost
is resolved by the nameserver, etc. etc. But I could not figure out what
the problem was.
Nevertheless, it is a bug, since postfix' configuration ought to be
independent of the particular setup of a server. Using 127.0.0.1 is
bulletproof.
For example:
content_filter = smtp-amavis:[localhost]:10024
should be:
content_filter = smtp-amavis:[127.0.0.1]:10024
** Affects: postfix (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/948320
Title:
main.cf should not refer to localhost
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