We've set up two servers (ssd raid/64GB/fast dual cpu) with postmulti to deliver the mail for our newsletter service (legitimate mail). Both servers have 12 postfix instances running. Mails is injected from php scripts running at a different server.
Lately we're seeing timeouts from the php scripts at busy moments. I've been trying to debug this, but can't find the issue. Some information: - Mail is injected through smtp, port 25 - The active queue is almost empty, even at peak moments (qshape) - Number of deferred mails is low - I've set default_process_limit to 10000 and smtpd_client_connection_count_limit to 3000 - Load on the servers is never higher then 2 - Number of smtp processes peaks at about 2000 - We're running local DNS - We're using opendkim to sign every message What can I do to find the reason for the timeouts? Thanks. -- View this message in context: http://postfix.1071664.n5.nabble.com/Timeouts-when-submitting-mail-tp91116.html Sent from the Postfix Users mailing list archive at Nabble.com.
