>> dbl.spamhaus.org is a domain blacklist, So I guess the email contains a link which is listed there and the reject code is an unfortunate phrase. We do it in a similar manner but with a clearly reject text.
Try to find out the links from within the email and test the URLs against DBL. Or send an email without text/URL to the recipient to find out if they really messed up the blacklisting. Mit freundlichen Grüßen / Kind Regards Olaf Petry -----Ursprüngliche Nachricht----- Von: mailop [mailto:mailop-boun...@mailop.org] Im Auftrag von Paul Smith Gesendet: Mittwoch, 24. Januar 2018 13:13 An: mailop <mailop@mailop.org> Betreff: [mailop] Anyone from Fasthosts.co.uk on here? We've had some messages rejected from Fasthosts' MX mail servers with an error like this: ---------- 550 5.7.1 Service unavailable; client [188.65.177.237] blocked using dbl.spamhaus.org ---------- dbl.spamhaus.org doesn't list IP addresses, so I'm not sure what's going on. I don't know if someone has gone a bit mad and added all the DNS blacklists they can find to their spamfilter, not realising that dbl.spamhaus.org is a domain blacklist, not an IP blacklist. When you do query dbl.spamhaus.org with an IP address, it gives a response which could be interpreted as meaning the IP address is listed, so that could be why the messages are being blocked. _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
