nanog mailing list archives
Re: Spamhaus...
From: Paul Vixie <vixie () isc org>
Date: Mon, 22 Feb 2010 19:34:43 +0000
John Levine <johnl () iecc com> writes:
I now do nearly all of my spam filtering during the SMTP session.
+1.
There might once have been a reason to accept quickly and chew through the mail later, but these days it all needs chewing so you might as well do it right away. This has the huge advantage that you can reject unwanted mail after data with 550 FOAD rather than bouncing.
there was once an argument for silent discard on spam, to keep spammers from being able to tune their entropy to get past one's filters. these days the spammers don't have to tune anything and don't tune anything, so there's no advantage to silent discard or to asynchronous filtering. everything that can be rejected synchronously, should be. there's a small chance that the rejection notice will go to a nonbot nonspammer who can correct their mistake and retry. that chance is worth taking. -- Paul Vixie KI6YSY
Current thread:
- Re: Spamhaus..., (continued)
- Re: Spamhaus... Larry Sheldon (Feb 20)
- Re: Spamhaus... Michael Dillon (Feb 20)
- Re: Spamhaus... Larry Sheldon (Feb 20)
- Re: Spamhaus... Valdis . Kletnieks (Feb 20)
- Re: Spamhaus... Larry Sheldon (Feb 20)
- Re: Spamhaus... Joel Jaeggli (Feb 20)
- Re: Spamhaus... Larry Sheldon (Feb 20)
- Re: Spamhaus... William Herrin (Feb 20)
- Re: Spamhaus... John Levine (Feb 20)
- Re: Spamhaus... William Herrin (Feb 21)
- Re: Spamhaus... Paul Vixie (Feb 22)
- Re: Spamhaus... Rich Kulawiec (Feb 21)
- Re: Spamhaus... William Herrin (Feb 21)
- Re: Spamhaus... Patrick W. Gilmore (Feb 21)
- Re: Spamhaus... James Hess (Feb 21)
- Re: Spamhaus... Rich Kulawiec (Feb 24)
- Re: Spamhaus... William Herrin (Feb 24)
- RE: Spamhaus... Tomas L. Byrnes (Feb 21)
- RE: Spamhaus... Tomas L. Byrnes (Feb 21)
- Re: Spamhaus... Paul Vixie (Feb 21)
- Re: Spamhaus... Michelle Sullivan (Feb 21)