X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=Documentation%2Fpublic-inbox-mda.pod;h=b992ca241cb76a4d81c08d8eaf1528b81606f0f2;hb=af0b0fb7a454470a32c452119d0392e0dedb3fe1;hp=64ec690cc568a3ccc71f085b81c4bef94221b427;hpb=9bd675d33ad1e49bd2ebe12a1d216216e61380de;p=public-inbox.git

diff --git a/Documentation/public-inbox-mda.pod b/Documentation/public-inbox-mda.pod
index 64ec690c..b992ca24 100644
--- a/Documentation/public-inbox-mda.pod
+++ b/Documentation/public-inbox-mda.pod
@@ -4,7 +4,7 @@ public-inbox-mda - mail delivery agent for public-inbox
 
 =head1 SYNOPSIS
 
-B<public-inbox-mda> E<lt>MESSAGE
+  public-inbox-mda </path/to/RFC2822_message
 
 =head1 DESCRIPTION
 
@@ -16,6 +16,31 @@ By default, it relies on L<spamc(1)> for filtering mail,
 but may be disabled via
 L<public-inbox-config(5)/publicinboxmda.spamcheck>
 
+=head1 OPTIONS
+
+=over 8
+
+=item --no-precheck
+
+By default, public-inbox-mda does some simple checks before
+invoking L<spamc(1)> since it is intended to receive mail before
+it goes to a mailing list.
+
+However, some users prefer to use public-inbox-mda to mirror
+mailing lists.  This option exists to support those users.
+
+Using this option, the following prechecks are disabled:
+
+  * multiple Message-IDs
+  * non-existent Message-IDs
+  * Message-IDs longer than 244 characters long
+  * From: header shorter than 3 characters
+  * Subject: header shorter than 2 characters
+  * unusable Date: headers
+  * inbox address specified in To: or Cc: header
+
+=back
+
 =head1 ENVIRONMENT
 
 =over 8
@@ -25,6 +50,9 @@ L<public-inbox-config(5)/publicinboxmda.spamcheck>
 The original recipient email address, set by the MTA.  Postfix
 sets it by default, untested on other MTAs.
 
+This does not have to be set if relying on C<publicinbox.$NAME.listid>
+directives configured in L<public-inbox-config(5)>.
+
 =item PI_CONFIG
 
 Per-user config file parseable by L<git-config(1)>.
@@ -50,7 +78,7 @@ and L<http://hjrcffqmbrq6wope.onion/meta/>
 
 =head1 COPYRIGHT
 
-Copyright 2013-2019 all contributors L<mailto:meta@public-inbox.org>
+Copyright 2013-2021 all contributors L<mailto:meta@public-inbox.org>
 
 License: AGPL-3.0+ L<https://www.gnu.org/licenses/agpl-3.0.txt>