We are getting postmaster generated messages on our
postfix server. This just started happening yesterday out of the
blue. What I can’t figure out is what is the “Temporary
lookup Failure”? Is this a postfix issue? DNS issue? Or
something else?
Out: 220 mail.mydomain.com ESMTP Postfix
In: EHLO DHT3K091
Out: 250-mail.mydomain.com
Out: 250-PIPELINING
Out: 250-SIZE 15728640
Out: 250-VRFY
Out: 250-ETRN
Out: 250-AUTH PLAIN LOGIN
Out: 250-AUTH=PLAIN LOGIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: AUTH LOGIN
Out: 334 VXNlcm5hbWU6
In: bWFyeWFubmNveEBkdXJhY29tLm5ldA==
Out: 334 UGFzc3dvcmQ6
In: bWFjMjYzMQ==
Out: 235 2.0.0 Authentication successful
In: MAIL FROM: <maryanncox AT mydomain DOT com>
Out: 250 2.1.0 Ok
In: RCPT TO: <xxxxxx AT blowthewhistle DOT com>
Out: 451 4.3.0 <xxxxxx AT blowthewhistle DOT com>:
Temporary lookup failure
In: RCPT TO: <xxx AT sbcglobal DOT net>
Out: 451 4.3.0 <xxx AT sbcglobal DOT net>: Temporary lookup
failure
In: QUIT
Out: 221 2.0.0 Bye
