From f4554bfa6cb66575fc1e23f1ce095aa2136c07c1 Mon Sep 17 00:00:00 2001 From: Eric Allman Date: Tue, 20 Jun 1995 01:11:35 -0800 Subject: [PATCH] warn of the sins of wildcard MX records SCCS-vsn: usr.sbin/sendmail/src/READ_ME 8.97 --- usr/src/usr.sbin/sendmail/src/READ_ME | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/usr/src/usr.sbin/sendmail/src/READ_ME b/usr/src/usr.sbin/sendmail/src/READ_ME index f341a5df4b..e2ce45eb02 100644 --- a/usr/src/usr.sbin/sendmail/src/READ_ME +++ b/usr/src/usr.sbin/sendmail/src/READ_ME @@ -4,7 +4,7 @@ # # %sccs.include.redist.sh% # -# @(#)READ_ME 8.96 (Berkeley) %G% +# @(#)READ_ME 8.97 (Berkeley) %G% # This directory contains the source files for sendmail. @@ -483,6 +483,13 @@ and linked with BIND 4.8 or vice versa, and it doesn't work. Unfortunately, it doesn't fail in an obvious way -- things just subtly don't work. +WILDCARD MX RECORDS ARE A BAD IDEA! The only situation in which they +work reliably is if you have two versions of DNS, one in the real world +which has a wildcard pointing to your firewall, and a completely +different version of the database internally that does not include +wildcard MX records that match your domain. ANYTHING ELSE WILL GIVE +YOU HEADACHES! + +-------------------------------------+ | OPERATING SYSTEM AND COMPILE QUIRKS | @@ -1070,4 +1077,4 @@ version.c The version number and information about this Eric Allman -(Version 8.96, last update %G% 12:37:34) +(Version 8.97, last update %G% 18:11:35) -- 2.20.1