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Bob Brennan wrote:
| My question is - long term - is it better to set up the mailserver to | reject all non-mailbox emails to cut down on the incoming processing
In my experience, I had an immediate reduction in virus emails by allowing only specified usernames on the left hand side of the email address, and I did not miss any genuine emails by this AFAIK. So I really recommend it.
I don't think you should be sending "rejection notices" at all, but simply not accepting obviously bad mail with a 5xx reject code. A genuine user will be notified by HIS email server that there was a problem. A spammer will just give up after a few tries. (I mean give up until the next spew of junk, not give up for good unfortunately).
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