18 Sep
2003
18 Sep
'03
12:24 p.m.
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>