In master.cf smtp-tar unix - - y - 1 smtp -o syslog_name=postfix/$service_name
In main.cf smtp-tar_destination_rate_delay = 600s smtp-tar_destination_concurrency_limit = 3 smtp-tar_destination_recipient_limit = 2 smtp-tar_initial_destination_concurrency=2 In transports yahoo.com smtp-tar: My understanding is that w/ the above settings, the first sends going to @yahoo.com should fire off two simultaneous smtp connections. Then at some point, it'll build up to three. I don't see that. I reload postfix at 21:48 and this is what I see in the logs for outbound yahoo.com Jan 17 21:48:01 postfix2 postfix/smtp-tar/smtp[2541820]: B142044CB2: to=<xx...@yahoo.com>, relay=mta5.am0.yahoodns.net[98.136.96.74]:25, delay=4255, delays=4255/0.06/0.15/0.4, dsn=2.0.0, status=sent (250 ok dirdel) Jan 17 21:58:06 postfix2 postfix/smtp-tar/smtp[2542451]: EC44B44751: to=<yyy...@yahoo.com>, relay=mta6.am0.yahoodns.net[67.195.204.79]:25, delay=17699, delays=17093/601/0.23/5.1, dsn=2.0.0, status=sent (250 ok dirdel) Jan 17 22:08:07 postfix2 postfix/smtp-tar/smtp[2543075]: 1135144D94: to=<zzz...@yahoo.com>, relay=mta6.am0.yahoodns.net[98.136.96.91]:25, delay=2122, delays=914/1206/0.16/0.67, dsn=2.0.0, status=sent (250 ok dirdel) I'm only seeing one outbound at a time, every ten minutes. Am I doing something wrong here?