On 6/21/05, Christopher L Merrill <[EMAIL PROTECTED]> wrote:
> That's an interesting way to identify spam, but does it help you
> reduce the spam at all? Is there any way to "revoke" an address
> you have given out? In other words, once somebody starts spamming
> on an address you have given out, can you disable that address?
>
> I ask because I've been doing a similar thing for 2 years now using
> an aliases file in Postfix. I started this as an experiment to find
> out if any vendors I deal with were selling their e-mail address
> database (apparently, most do not). Making an entry in the aliases
> file every time I need a new address can be cumbersome, but has the
> advantage of being able to "revoke" the address at a later date.
Yes, you can revoke these addresses. I do it this way. In /etc/postfix/main.cf
under smtpd_recipient_restrictions I add the following line (along with some
other stuff I'm not showing to make things more clear)
smtpd_recipient_restrictions =
check_recipient_access hash:/etc/postfix/access-inbound
Then in the file /etc/postfix/access-inbound (which could be named anything)
I put this:
[EMAIL PROTECTED] REJECT
I can put any more addresses that I want to reject in access-inbound
and it will work just as you expect.
Note, btw, that you can put other addresses there also. For instance,
I also have this there:
[EMAIL PROTECTED] OK
[EMAIL PROTECTED] OK
[EMAIL PROTECTED] OK
[EMAIL PROTECTED] REJECT Wayfarer.org doesn't deal with
insurance. Check your address.
Note on the last one you can give a reason for the rejection that will be shown
when postfix rejects the e-mail. You can also use DISCARD instead of REJECT
but that's not recommended because it silently discards e-mail without any
notice to anyone. REJECT at least lets the sending MTA know there's an
error.
That's actually another thing I prefer about postfix over qmail. When qmail
wants to reject an e-mail it accepts the e-mail and then generates a rejection
bounce. That is incorrect in every sense of how things should be. Postfix,
on the other hand, can reject as the mail is coming in, before accepting the
e-mail. This reduces the number of spurious bounces (because if an e-mail
is forged, qmail will bounce it back to the forged address while postfix, by
rejecting before receiving, will not).
Cheers,
Tanner
--
Tanner Lovelace
clubjuggler at gmail dot com
http://wtl.wayfarer.org/
http://www.freeiPods.com/?r=8127171
(fieldless) In fess two roundels in pale, a billet fesswise and an
increscent, all sable.
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