North American Network Operators Group
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Re: Verisign suggestion
- From: Todd Vierling
- Date: Thu Sep 18 08:36:01 2003
On Thu, 18 Sep 2003, David B Harris wrote:
: > ...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!
: 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."
Then the wildcard should have included a MX that points to nowhere, rather
than implementing a fake MTA that allows the MAIL FROM and RCPT TO addresses
to be transmitted. The record "IN MX 0 ." is commonly used for this
purpose.
--
-- Todd Vierling <tv@duh.org> <tv@pobox.com>
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