[nSLUG] Whither to bounce unknown recipient address?

Ian Campbell ian at slu.ms
Thu Aug 30 15:19:15 ADT 2007


On Thu, Aug 30, 2007 at 03:14:32PM -0300, D G Teed wrote:
> Thanks for the tips.  We've got amavisd+SA , RBL+,
> clamav, reject from reverse DNS failure and
> many more configurations to defeat spammers.
> SPF and DKIM are on my to do list.

Be careful with permanent rejections based on DNS checks. If your DNS
breaks, you might be losing mail if your DNS breaks. 
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