Doug Hardie:
> This is a small server with a few users that are all local. There
> are several domain names that point to this server, but all of
> them are just aliases for the main name. Received mail stops at
> the rcpt to: line. There is no OK that occurs until shortly after
> 3 minutes from that line being received. During that time ktrace
> shows multiple calls and sleeps for proxymap. After the 3+ minute
> delay, it issues the OK and then they rest proceeds normally. I
> suspect this is a configuration error since this server was just
> updated to 3.3.4 from an earlier version. The earlier version
> worked fine. This problem started when the upgrade completed.
By default, the Postfix SMTP server invokes the proxymap
service for local user lookup, because the default
local_recipient_maps setting looks like this:
local_recipient_maps = proxy:unix:passwd.byname $alias_maps
Try, as a root user:
postmap -q nosuchuser proxy:unix:passwd.byname
postmap -q root proxy:unix:passwd.byname
I suspect that your proxymap service is busted.
Wietse