Hi,
I'm hoping I could ask what is probably an FAQ but I haven't seen anything
on it recently. I've already implemented some type of rate limiting for
delivering to gmail, but it's apparently not working satisfactorily for
them. Notice it's already going through my throttled transport.
This mail server unfortunately has quite a few users who use ~/.forward to
forward mail through to their personal gmail account from their corporate
account.
Aug 22 15:33:08 cipher postfix-gmail/smtp[2551987]: 5EF9820E0E1E8: host
gmail-smtp-in.l.google.com[64.233.176.27] said: 421-4.7.28 [209.216.111.60
15] Our system has detected an unusual rate of 421-4.7.28 unsolicited
mail originating from your IP address. To protect our 421-4.7.28 users from
spam, mail sent from your IP address has been temporarily 421-4.7.28 rate
limited. Please visit 421-4.7.28
https://support.google.com/mail/?p=UnsolicitedRateLimitError to 421 4.7.28
review our Bulk Email Senders Guidelines. 185-
transport_maps = regexp:/etc/postfix/transport_limit,
regexp:/etc/postfix/transport_gmail,
regexp:/etc/postfix/transport_yahoo,
regexp:/etc/postfix/transport_microsoft,
regexp:/etc/postfix/transport_fast
gmail_initial_destination_concurrency = 1
gmail_destination_concurrency_limit = 4
gmail_destination_recipient_limit = 15
gmail_connect_timeout=3s
gmail_connection_cache_on_demand=no
/etc/postfix/transport_gmail:
/googlemail.com$/ gmail:
/gmail.com$/ gmail:
/google.com$/ gmail:
/etc/postfix/master.cf:
gmail unix - - n - - smtp
-o syslog_name=postfix-gmail
-o smtp_connect_timeout=$gmail_connect_timeout
-o smtp_connection_cache_on_demand=$gmail_connection_cache_on_demand
Any ideas for further tweaking? I'd imagine this is primarily for bulk
email (as the message says), so perhaps I need a separate transport
specifically for bulk email?
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