Running postfix-3.0.3 on Slackware-14.1 here. I need to relay outbound messages through my ISP. When I send newsletters to subscribers I need to limit the number of messages per hour to < 300. To accommodate this need I understand that within main.cf I set
default_destination_rate_delay = 15 seconds and this will send 240 messages per hour. Reading the postconf.5 page I see the paragraphs, "Use transport_destination_rate_delay to specify a transport-specific override, where transport is the master.cf name of the message delivery transport. "NOTE: with a non-zero _destination_rate_delay, specify a transport_destination_concurrency_failed_cohort_limit of 10 or more to prevent Postfix from deferring all mail for the same destination after only one connection or handshake error." and I have no idea if 1) I need to specify a transport_destination_rate_delay and if so, 2) should I use smtp or smtpd because that's the uncommented service in master.cf: # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== smtp inet n - n - - smtpd #smtp inet n - n - 1 postscreen #smtpd pass - - n - - smtpd #dnsblog unix - - n - 0 dnsblog #tlsproxy unix - - n - 0 tlsproxy #submission inet n - n - - smtpd Guidance on correctly setting up main.cf to delay list mailings via my ISP using default_destination_rate_delay is what I need. Rich
