On 14:28:40 Aug 29, Jose Fragoso wrote: > Hi, > > I am running OpenBSD 4.4, spamd and greyscanner41 in a box. > > Looking at the log entries from the greyscanner, I found this > entry and others which I find a bit strange: > > Aug 28 12:55:44 wall greytrapper[25604]: Trapped 209.85.132.241: > Mailed from sender gmail.com with no MX or A > > Now, this IP address has an A record and it is from google. > > So my guess is that due to some temporary network instability, the > reverse lookup is failing. > > But should the greyscanner script not be able to identify this and > disregard instead of trapping the IP address?
You must be aware that google and other such popular mail services like yahoo!, hotmail etc. blatantly flout RFC2821 and retry mails from a bank of mail servers. This does not go well with greylisting of course. Consequently I have observed google's mail servers getting tarpitted. But I have also seen that over time when more mails start coming from these domains the greylisting process whitelists them. I would rather we not interfere with the internal clockwork of OpenBSD greylisting by manually correcting such arrant misbehaviors by popular mail vendors. Instead the correction happens over time automatically just the way the human body takes care of common cold. At least that is the way I tackled this issue. The longer answer is to be found in Calomel's site[1] and other Internet resources. -Girish 1) http://www.calomel.org/spamd_config.html
