>> Can I do any outgoing spam checks with postfix or I'm forced to >> install lots of Amavis, spamassassin, etc. software to do that job. >> > > I'm sorry to tell you that blocking outbound spam is at least harder > than blocking inbound spam. > > - you certainly need an anti-virus > - you "can" use spamassassin. but it's not enough. (note that "per > recipient Bayes" is of no use here). > > but you need to watch the behaviour of internal clients. you need to > detect abusive/abused clients. and to avoid problems, you want rate > limiting.
I just want to do some simple checks and rate limit seems like a good idea and it can be performed by postfix. - Martin
