diff options
Diffstat (limited to 'src/TUNING')
| -rw-r--r-- | src/TUNING | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/TUNING b/src/TUNING index 77c3f64f69018..8df58030a729e 100644 --- a/src/TUNING +++ b/src/TUNING @@ -1,4 +1,4 @@ -# Copyright (c) 2001-2003 Proofpoint, Inc. and its suppliers. +# Copyright (c) 2001-2003, 2014 Proofpoint, Inc. and its suppliers. # All rights reserved. # # By using this file, you agree to the terms and conditions set @@ -135,6 +135,17 @@ to send e-mail then either the -G option should be used or should be added to the .mc file. +Note: starting with 8.15, sendmail will not ignore temporary map +lookup failures during header rewriting, which means that DNS lookup +problems even for headers will cause messages to stay in the queue. +Hence it is strongly suggested to use the nocanonify feature; +at least turning it on for the MTA, but maybe disabling it for the +MSA, i.e., use Modifiers for DaemonPortOptions accordingly. +As a last resort, it is possible to override the host map to ignore +temporary failures, e.g., +Khost host -t +However, this can cause inconsistent header rewriting. + * Mailing Lists and Large Aliases (1-n Mailing) ----------------------------------------------- |