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).
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@ -171,8 +171,13 @@ tools/editconf.py /etc/postfix/main.cf \
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# Postfix connects to Postgrey on the 127.0.0.1 interface specifically. Ensure that
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# Postgrey listens on the same interface (and not IPv6, for instance).
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# A lot of legit mail servers try to resend before 300 seconds.
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# As a matter of fact RFC is not strict about retry timer so postfix and
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# other MTA have their own intervals. To fix the problem of receiving
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# e-mails really latter, delay of greylisting has been set to
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# 180 seconds (default is 300 seconds).
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tools/editconf.py /etc/default/postgrey \
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POSTGREY_OPTS=\"--inet=127.0.0.1:10023\"
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POSTGREY_OPTS=\"'--inet=127.0.0.1:10023 --delay=180'\"
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# Increase the message size limit from 10MB to 128MB.
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# The same limit is specified in nginx.conf for mail submitted via webmail and Z-Push.
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