nanog mailing list archives
Re: Outgoing SMTP Servers
From: "Ricky Beam" <jfbeam () gmail com>
Date: Tue, 25 Oct 2011 15:31:55 -0400
On Tue, 25 Oct 2011 12:55:58 -0400, Owen DeLong <owen () delong com> wrote:
Wouldn't the right place for that form of rejection to occur be at the mail server in question?
In a perfect world, yes. When you find a perfect world, send us an invite.
I reject lots of residential connections...
The real issue here is *KNOWING* who is residential or not. Only the ISP knows for sure; and they rarely tell others. The various blocklists are merely guessing. Using a rDNS name is an even worse guess.
However, senders who authenticate legitimately or legitimate sources of email (and yes, some spam sources too) connect just fine.
Authenticated sources can be traced and shutoff. If a random cablemodem user has some bot spewing spam, the only way to cut off the spam is to either (gee) block outbound port 25, or turn their connection off entirely. As a responsible admin, I'll take the least disruptive path. (I'll even preemptively do so.)
--Ricky
Current thread:
- Re: Outgoing SMTP Servers, (continued)
- Re: Outgoing SMTP Servers Ricky Beam (Oct 26)
- Re: Outgoing SMTP Servers Mark Andrews (Oct 26)
- Re: Outgoing SMTP Servers Leigh Porter (Oct 26)
- Re: Outgoing SMTP Servers Mark Foster (Oct 26)
- Re: Outgoing SMTP Servers Mark Andrews (Oct 26)
- Re: Outgoing SMTP Servers Bjørn Mork (Oct 27)
- Re: Outgoing SMTP Servers Jay Ashworth (Oct 26)
- Re: Outgoing SMTP Servers William Herrin (Oct 25)
- Re: Outgoing SMTP Servers Owen DeLong (Oct 25)
- RE: Outgoing SMTP Servers Matt McBride (Oct 25)
- Re: Outgoing SMTP Servers Ricky Beam (Oct 25)
- Re: Outgoing SMTP Servers Douglas Otis (Oct 25)
- Re: Outgoing SMTP Servers Scott Howard (Oct 26)
- Re: Outgoing SMTP Servers Owen DeLong (Oct 26)
- Re: Outgoing SMTP Servers Bjørn Mork (Oct 27)
- RE: Outgoing SMTP Servers Brian Johnson (Oct 27)
- Re: Outgoing SMTP Servers Valdis . Kletnieks (Oct 27)
- Re: Outgoing SMTP Servers Robert Bonomi (Oct 27)
- RE: Outgoing SMTP Servers Brian Johnson (Oct 27)
- Re: Outgoing SMTP Servers William Herrin (Oct 27)
- RE: Outgoing SMTP Servers Brian Johnson (Oct 27)