Le 18/07/2011 20:47, Steve Fatula a écrit : > Having read quite a few of the messages in this list about bounces, I really > didn't find any (though they may be there) related to preventing bounces for > resource limits, and other unpredictable and strange occurrences. That is my > question, NOT bad recipient, etc. Yes, I know bounces and rejects are totally > different. >
it's ok to bounce from to time to time. the problem is with volume and predictable mass bounces. if your setup sends bounces due to exceptional conditions, then it is ok. of course, you need a spam filter to minimise sending bounces because of spam. - if you bounce because of things like "overquota" or whatever delivery error, then you need to watch that. it is ok if happens from time to time. it is not ok if during a month, all mail to joe gets bounced. - use a spam filter to reduce the likelyhood to bounce spam. if your spam filter says it may be spam, then don't bounce. the thing is: don't let spammers use your setup to send us spam bounces. this does'nt mean blocking bounces. we do need to get your legitimate bounces as they are part of the robustness of the email system. If I send you mail and you can't get it, I expect to get a bounce. don't let spammers kill the email reliability. fight spam, not email. > The first thing that came up lately was an error in configuration I made when > creating some spam training transports. Message was sent, accepted, and, then > bounced when a backend error occurred. Starting poking around for Postfix > exploits as well, and, noticed the Delivered To header exploit that created > bounces apparently. So, certainly for exploits, I'd hate to generate bounces > that go to un-intended victims, but, you can't predict those I suppose. > > So, that is the reasoning I have. So, based on these reasons, is there any > good > way to never send any bounces from Postfix? Soft-bounces seems to work, but, > I've seen posts that say never leave it this way and of course it keeps them > all > in the queue but maybe that's good. Others have said to comment out the > bounce > server, but, then replies say it's there for good reason (not sure what that > is > though in modern times). > > My intent here it to not be accused of sending backscatter and thus spam of > course, and, especially with exploits, this is a possibility I'd like to > avoid > if possible. Nothing more or less. > > So, how do others handle this? Or, do you just handle when it occurs and not > worry about it? > > Steve
