[pfx] Re: connect to pgsql server could not translate host name

[Laura Smith via Postfix-users]

> > But I cannot understand why. Running, e.g. "dig foo.example.com"
> > returns instantly with the IP address, no problems with resolution?
> 
> 
> Are you typing that command as root? Most Postfix daemons don't.
> 

Yes, of course !  dig is a simple command that doesn't require root privileges.

In addition, I have multiple other non-root daemons running (e.g. chrony for 
time sync) that have zero problems with DNS resolution ! 


> This would be a good time to identify the program that logs
> the warning, and to report output from the command "postconf -Mf".
> 

The reporting program is postfix/smtpd

postconf output:

smtp       inet  n       -       y       -       -       smtpd
pickup     unix  n       -       y       60      1       pickup
cleanup    unix  n       -       y       -       0       cleanup
qmgr       unix  n       -       n       300     1       qmgr
tlsmgr     unix  -       -       y       1000?   1       tlsmgr
rewrite    unix  -       -       y       -       -       trivial-rewrite
bounce     unix  -       -       y       -       0       bounce
defer      unix  -       -       y       -       0       bounce
trace      unix  -       -       y       -       0       bounce
verify     unix  -       -       y       -       1       verify
flush      unix  n       -       y       1000?   0       flush
proxymap   unix  -       -       n       -       -       proxymap
proxywrite unix  -       -       n       -       1       proxymap
smtp       unix  -       -       y       -       -       smtp
relay      unix  -       -       y       -       -       smtp
    -o syslog_name=postfix/$service_name
showq      unix  n       -       y       -       -       showq
error      unix  -       -       y       -       -       error
retry      unix  -       -       y       -       -       error
discard    unix  -       -       y       -       -       discard
local      unix  -       n       n       -       -       local
virtual    unix  -       n       n       -       -       virtual
lmtp       unix  -       -       y       -       -       lmtp
anvil      unix  -       -       y       -       1       anvil
scache     unix  -       -       y       -       1       scache
postlog    unix-dgram n  -       n       -       1       postlogd
maildrop   unix  -       n       n       -       -       pipe flags=DRXhu
    user=vmail argv=/usr/bin/maildrop -d ${recipient}
uucp       unix  -       n       n       -       -       pipe flags=Fqhu
    user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail     unix  -       n       n       -       -       pipe flags=F user=ftn
    argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp      unix  -       n       n       -       -       pipe flags=Fq.
    user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n       n       -       2       pipe flags=R
    user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop}
    ${user} ${extension}
mailman    unix  -       n       n       -       -       pipe flags=FRX
    user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop}
    ${user}

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