Quoting Bernd Eckenfels ([EMAIL PROTECTED]): > If you relay mail from your customers, you have to deliver them their > bounces if they spam.
Well, that's the trick, isn't it? If they're sending spam (either deliberately or -- much more likely of late -- because customer hosts have been zombified by malware), then the sender addresses and (of late) the envelope return path will almost certainly be forged. It's possible you're taking that fact into account: I'd be curious to hear how you (or others) are ensuring that such bounces go somewhere appropriate.
