Now I'm becoming a pest!
I get periodic 'temporary lookup failures'. Does anyone know what could cause that? It doesn't happen all the time. Aren't the lookups happening on the mail host machine - like the local LDAP?
snippet from messgage:
In: MAIL FROM:<email@example.com> SIZE=16244640
Out: 250 Ok
In: RCPT TO:<firstname.lastname@example.org>
Out: 451 <email@example.com>: Temporary lookup failure
Out: 221 Bye