nanog mailing list archives
Re: Verisign suggestion
From: David B Harris <david () eelf ddts net>
Date: Thu, 18 Sep 2003 00:36:05 -0400
On Thu, 18 Sep 2003 00:25:48 -0400 (EDT) Gerald <gcoon () inch com> wrote: <snip>
...and for heavens sake, stop accepting any kind of request at all on port 25!! Just shut it down altogether. There is no reason for you to accept any connection of any kind on port 25!
I shall only respond to this portion. The rest of it ... well, I'll just leave it at that :) If they don't accept anything on port 25, either by sending all packets to /dev/null or by responding with SYN+RST ("Connection refused"), MTAs everywhere will consider this a "temporary error." In other words, the mail will sit on queues for weeks, typically, until an error is finally sent to the sender. Currently an error is sent to the sender immediately.
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Current thread:
- Verisign suggestion Gerald (Sep 17)
- Re: Verisign suggestion David B Harris (Sep 17)
- Re: Verisign suggestion Valdis . Kletnieks (Sep 17)
- Re: Verisign suggestion Todd Vierling (Sep 18)
- Re: Verisign suggestion Niels Bakker (Sep 18)
- Re: Verisign suggestion David B Harris (Sep 18)
- Re: Verisign suggestion Leo Bicknell (Sep 18)
- Re: Verisign suggestion David B Harris (Sep 17)