Bazooka Joe schrieb: > Last week I got a client that wanted me to spam virii filter for their > in house exchange server. > > I changed the mx from mail.domain.tld (their exchange) to > mail2.domain.tld (my sa box) which relayed to mail.domain.tld. > > Last week all worked as expected. The hundreds of spam droped to 0; > until this weekend. Looking at the headers, mail is going directly to > the mail.domain.tld even though it isn't listed as mx anywhere. > > I can tell the exchange server to only except mail from my server but > has anyone else experienced this? > > -bazooka
yes this is expected bots may late with dns changes, or ignore it and pull simply to known ip adresses if you use a antispam relay before exchange you should manage exchange only accept mail from the relay an deliver out only trough the relay, you may chnage A entry hostname and ip for the exchange too, there are lots of faqs out using i.e postfix as relay for exchange out in the web, read it -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
