On Thursday 03 February 2005 3:32 pm, Matt Kettler wrote: > I encountered one ISP who's legitimate mail gateway is freaking out under > the load of all the proxy spam. > > It's now retrying temp-fail messages immediately without any delay... 24+ > times per second. > > Since I have Sendmail set up to verify sender domains exist, a lot of spam > gets a 451 error.. Unfortunately, this server doesn't give up. Since Monday > they tried to deliver a small number of different messages a total of 1.6 > million times. > > "reject=451 4.1.8 Domain of sender address [EMAIL PROTECTED] does not > resolve"..... Over and over and over again.. > > Needless to say, my maillog is rather huge this week with about 300mb of > the above messages tacked on top of my normal logging. > > Other admins might want to watch out for this kind of garbage..
Those sorts of mail servers end up in my firewall rules till some point in the future.
