On Tue, May 03, 2016 at 03:25:26PM +0000, Viktor Dukhovni wrote: > On Tue, May 03, 2016 at 10:57:31AM -0400, Steven Peterson wrote: > > > $>cat /etc/postfix-br/master.cf > > ... > > acct_client1 unix - - n - - smtp > > -o syslog_name=br-client1 > > -o smtp_bind_address=185.94.24.84 > > -o smtp_helo_name=news.client1.org > > The below settings are queue-manager settings and must be made in > main.cf, not master.cf. > > > -o acct_client1_destination_concurrency_limit=2 > > -o acct_client1_destination_recipient_limit=5 > > -o acct_client1_destination_rate_delay=1s > > -o initial_destination_concurrency=2 > > -o acct_client1_destination_concurrency_failed_cohort_limit=200
Also note that rate delay forces the concurrency to 1, so you can't go faster than 1 message per second with rate delays. You really need to contact comcast.net and get whitelisted (if you're sending email that comcast users want and have signed up for). If you're sending unsolicited bulk email to comcast users, I'm afraid that comcast has every right and incentive to make your job as difficult as possible. -- Viktor.