I see lines that look like this infrequently:
Jan 14 07:38:08 honker courierd: newmsg,id=00007621.40054640.00001C1C: dns; localhost (softdnserr [::ffff:127.0.0.1])
What does the softdnserr mean? Why don't I see it with every message?
It means that one of the following things has happened when trying to resolve the connecting IP address backwards and forwards, via DNS:
â The DNS server did not respond
â The DNS server responded with a TEMPFAIL error indication
â The forward and reverse DNS does not match
If your local DNS server cannot handle forward/reverse DNS resolution for 127.0.0.1, then something is seriously broken.
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