I working with an application which collects data and emails me the results. Reading it in a mailinglist-like fashion is optimal for me.
It can generate a large number of mails in a short time, so I'm trying to limit how many concurrent sockets pf on that box opens with my MXs. Each subset of messages has a different +extension in the localpart. Ideally, I'd like it to open one to each of the equal-priority MXs, starttls with each, and dump the mails between them until the queue drains. I tried setting: smtp_destination_concurrency_limit = 2 smtp_connection_cache_destinations = jhcloos.com but still get as many Verified TLS connection established messages in the logs as status=sent lines. And netstat agrees that many sockets are used in parallel. Do any of: smtp_dns_support_level=dnssec smtp_use_tls=yes smtp_enforce_tls=yes smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_tls_security_level = dane smtp_tls_note_starttls_offer = yes interfere with concurrency limits? That box has pf 2.11.1. -JimC -- James Cloos <cl...@jhcloos.com> OpenPGP: 0x997A9F17ED7DAEA6