Am 13.09.2011 10:54, schrieb Simon Loewenthal/NL/Tele2:
> I have a seen a few of these messages popping up in the mail.log > over the past weeks. Would someone tell me whether this is a > configuration problem with my server, or a remote site? The 451 error > has appeared from a couple of sites, hence I wonder if the problem lies > with my site. In the case of the example below, the message is delivered. > > relay=mail.gigahost.dk[89.186.169.167]:25, delay=394, > delays=393/0.02/0.12/1, dsn=4.3.5, status=deferred (host > mail.gigahost.dk[89.186.169.167] said: 451 4.3.5 Server configuration > problem (in reply to RCPT TO command)) if you get from a remote host "said: 451 4.3.5 Server configuration problem" this message says clearly that the remite host has a configuration problem and this has nothing to do with you
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