From 11546b97bb409a2fbfcc8cae8ae2e08be18ca356 Mon Sep 17 00:00:00 2001 From: Xoib Date: Tue, 19 May 2015 11:53:10 +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 | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/setup/mail-postfix.sh b/setup/mail-postfix.sh index e9e189a7..bd10546b 100755 --- a/setup/mail-postfix.sh +++ b/setup/mail-postfix.sh @@ -171,8 +171,13 @@ 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\" + POSTGREY_OPTS=\"'--inet=127.0.0.1:10023 --delay=180'\" # Increase the message size limit from 10MB to 128MB. # The same limit is specified in nginx.conf for mail submitted via webmail and Z-Push.