On Thu, 27 Aug 1998, Rudolf Kompf wrote:
> My site uses the host mail.xx.yy.zz of our ISP as relay. As result of
> misconfiguration of the ISP's relay host we got errors such as
>
> SMTP error from remote mailer after RCPT to: <ddd@???>:
> host mail.xx.yy.zz [the.ip.number]: 451 ........Error-text....
>
> in our exim's logfile for many hours. (Error-text said that the relay-host
> rejects our outgoing mail as spam.)
>
> Is there a way to react upon this in our exim-configuration, e.g. freeze
> the outgoing mail?
Only by freezing it by hand. This is one of the current outstanding
problems that I would like to solve one day. The problem is that 451 is
a temporary error, applying (apparently) to just that one address, so
Exim keeps trying it again. The ISP's mailer should do better than that.
If it thinks your message is spam, it should sent a 5xx error code,
which indicates a permanent error. All 4xx errors mean "please try again
later".
Maybe one day I will think of a clever way of noticing that errors like
this are repeating a lot, and find a way of converting the temporary
error into a permanent one. However, I have been too busy doing other
things to consider this problem, I'm afraid, so it is likely to be some
time before anything is done about it.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--
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