Chris Berry <[EMAIL PROTECTED]> writes:
> You really need to be using multiple mechanisms. In addition, I highly
> recommend against using TMDA first, you should be using that as your
> last line of defense.
Agreed. That minimizes unnecessary bandwidth consumed by challenges to
senders that can be determined to be invalid by other methods.
I filter in the following order:
1. My MTA's own, built-in validity checks (I use Courier).
2. My own home-grown filters installed as part of the "courierfilter"
mechanism. These reject messages based on their headers, before
they are accepted by the SMTP dialog.
3. My own home-grown maildrop filters that check complete messages
after they are accepted by the SMTP dialog.
4. SpamAssassin filtering.
5. TMDA's non-challenge-response filters reject appropriate messages.
6. TMDA's challenge-response mechanism.
--
Lloyd Zusman
[EMAIL PROTECTED]
God bless you.
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