I doubt that you can trick some of the spammers some of the time...
For years now, I have several addresses invented by spammers. I've always rejected non-existent addresses with 5xx, and they still attempt to send to these daily. So while I think that rejecting (not bouncing) spam sent to a valid address is a good thing, it has no effect on the incoming volume.
Gerry Todd Richards wrote:
Thanks Matti. I think I had read somewhere that you can trick the spammers into thinking the person is unknown by returning the 5xx on spam messages. Again, whether it's good practice or not is another question (unless you have a foolproof system, seems a little risky to me). I am going to treat those "unknown" as such, and remove them. If users complain that they are not getting them, then they can take it up with their providers! Todd -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matti Haack Sent: Thursday, May 15, 2008 2:04 AM To: Rod Dorman Subject: Re[2]: [IMail Forum] Understanding Returned Mail Maybe it is some kind of anti-Spam messure. Maybe they reject bulk email or there was something in the content of your mail, which triggered this. ASSP e.g. can be configured to reply 5xx to Spam Messages, so the sender will think the adress is invalid. But normal content may pass. (If this is a good practice is another question) So the adress could be correct, but they refuse your content. Matti
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