>This might be obvious, but I'm stumped right now:
>
>How do I stop spammers who send email with a From: address as the same
>as the To: address?
Some just asked a couple hours ago -- quite a coincidence!
>What's to stop someone from sending an email to [EMAIL PROTECTED] from
>[EMAIL PROTECTED] (with Reply-to as [EMAIL PROTECTED]) via my SMTP server?
There is nothing that will stop it.
>Note that [EMAIL PROTECTED] could access my server via any of a zillion
>different Internet connections (from the LAN at his office, from his
>dialup ISP while on the road, from his cable modem at home, from a
>client worksite, from the Moon, etc.) -- that means I can't just allow
>specific IP ranges to connect via SMTP.
Well, you *should* prevent him from relaying (sending to addresses outside
your server). But you should *not* preventing him from sending mail to
users on your server.
>Do I just need more sleep, and this is really obvious? Or is this as
>tough as it appears to me right now?
This is something that we are considering adding to our Declude JunkMail
product. However, note that some people intentionally send E-mail to
themselves (either as a test, or they Cc: themselves for whatever reason),
so this test wouldn't be 100% effective.
-Scott
---
Declude: Anti-virus, Anti-spam and Anti-hijacking solutions for
IMail. http://www.declude.com
---
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