Noel, thanks a lot for your help.
Just to precise my need for information: > > 554 5.7.1 > > <sil...@foreigndomain.tld>: Relay access denied; > > This is the response postfix sent to the remote client. The > SMTP response is 554 (a permanent error) with an extended code > of 5.7.1, and a text description of what was rejected (the > recipient address) and why (relay access denied). Is the Email address at exactly that place always (by definition of the logline format) the recipients Email address ? Or may there be placed any text information (i.e. in some cases the senders address ) ? The question is just, how and as what to interpret the information at that part of the logline. We are just struggling to find out if there's a certain problem with Thunderbird (but almost probably, just the mail user messed up his SMTP configuration ffor his mail account). The mail server setup itself works like a charm. Thanks again Tom
