On Sun, 12 Jul 2009, Keld Jørn Simonsen wrote: > >> Anyway if it is a name server timeout, then I think this is always > >> handled by a 450 response. In my case the mail was rejected. > > > > Yes, temporary errors always get a 450 response. > > Then I do not understand why the message was rejected. A temporary error > should not result in a reject, or why should this happen?
A 450 response *is* a reject; the 4xx SMTP reply code tells the sending server to queue and try again later. This contrasts with 5xx rejections which are permanent, i.e. mail is not queued/retried, but returned to sender. -- Sahil Tandon <sa...@tandon.net>
