Re: [Exim] permanent failure for spam

Ron McKeating wrote:

>Hi all, some of our staff here at the University have other accounts to
>which they forward their email. An example is btinternet. Lately I
>noticed lots of log entries like this
>
>2003-11-05 12:09:15 1AHMOu-0001sR-8k == arthur.gould1@???
><Arthur.Gould1@???> R=dnslookup T=remote_smtp defer (-18):
>Remote host moongate.btinternet.com [194.73.73.118] closed connection in
>response to end of data
>
>I did a bit of sniffing around and discovered there were about 130 of
>these in the queue and every single one was a spam. It is not the users
>fault, they just want to forward their email to their btinternet
>account, and any spam that gets through our filters gets forwarded.
>
>Now it seems that btinternet are doing spam filtering at the smtp
>transaction and if it identifies a spam it breaks the connection with a
>defer. Is this normal? we are thinking of setting up exiscan to do this
>to emails with big spam scores but we were planning to do a deny, eg a
>550 permanent error. The way bt are doing it, the email sits in our
>queue for 8 days and we constantly re-attempt to deliver it.
>
>What do others do, should it be a defer or a permanent failure ?
>
>

I saw a bunch of btinternet in the log -- rejected by Spamcop