Nikolaos Milas: > connect to vmail2.noa.xxx[2001:648:2011:15::xxx]:25: Connection refused;
This is a TCP-level problem. The remote server's TCP/IP stack, or some middle box, is refusing connections at the TCP level. All Postfix can do is make fewer connections. To reduce connection concurrency: - a reduced SMTP client process limit in master.cf, (http://www.postfix.org/master.5.html) - a reduced transport_destination_concurrency_limit in main.cf, (http://www.postfix.org/postconf.5.html#transport_destination_concurrency_limit) To reduce the connection rate, if things get really desperate: - a non-zero transport_destination_rate_delay in main.cf. (http://www.postfix.org/postconf.5.html#transport_destination_rate_delay) Wietse
