I.Petrov wrote:
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Hello,
Per I didn't say that is unusual. I think however that this is a bad spam prevention practice.
I mistook your comment to mean you found it unusual, sorry. In my company we fight spam too, but a mailserver with a missing or incorrect reverse mapping is simply dodgy. It indicates poor admin practice, perhaps due to inexperience, carelessness - or simply a trojan.
Especially when you reject the connection just because the PTR record is missing, or does not resolves to the hostname in the EHLO command. A better approach probably is to flag the mesasge as spam or as suspicious.
I agree with that, that's what we do too. However, I also understand the situation of large access providers - get rid of as much spam as possible whilst keeping costs low. -- Per Jessen, Zürich (11.8°C) http://www.dns24.ch/ - your free DNS host, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org