From 6781276959fcea973881fa5a919d16d82399d0be Mon Sep 17 00:00:00 2001 From: Xoib Date: Tue, 19 May 2015 18:25:55 +0200 Subject: [PATCH] softer the greylisting delay restriction A lot of legit mail servers try again between 200 and 285 seconds, then 3 hours later. Why? RFC is not strict about retry timer so postfix and other MTA have their own intervals. To fix the problem of receiving these e-mail really latter, I reduced the delay of postgrey to 180 seconds (default is 300 seconds). --- setup/mail-postfix.sh | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/setup/mail-postfix.sh b/setup/mail-postfix.sh index 972d9f32..efc833db 100755 --- a/setup/mail-postfix.sh +++ b/setup/mail-postfix.sh @@ -171,6 +171,11 @@ tools/editconf.py /etc/postfix/main.cf \ # Postfix connects to Postgrey on the 127.0.0.1 interface specifically. Ensure that # Postgrey listens on the same interface (and not IPv6, for instance). +# A lot of legit mail servers try to resend before 300 seconds. +# As a matter of fact RFC is not strict about retry timer so postfix and +# other MTA have their own intervals. To fix the problem of receiving +# e-mails really latter, delay of greylisting has been set to +# 180 seconds (default is 300 seconds). tools/editconf.py /etc/default/postgrey \ POSTGREY_OPTS=\"--inet=127.0.0.1:10023 --delay=180\"