Good to know. I think we've addressed the problem, but it's nice to know we've got a lot of headroom to move up. Total traffic is ~40k messages/day, and our big sticking point's been Yahoo though we've been talking with them and may be doing better (hopefully lots better).
The slow connections are mostly smaller clients with low delivery rates, and we're suspecting under-provisioned MS Exchange servers and the like. Thanks. On Tue, Oct 18, 2011 at 8:25 AM, Viktor Dukhovni <postfix-us...@dukhovni.org > wrote: > On Mon, Oct 17, 2011 at 07:17:18PM -0700, Edward Morbius wrote: > > > Several of our peer mail systems (outbound) seem to take a while > responding > > to initial SMTP connections. > > > > Is there any particularly dread pitfall to watch out for in bumping these > > values up? 20s for connection, 40s for HELO is where we're at presently. > > These values are well below Postfix built-in defaults. > > $ postconf -d | grep '^smtp_' | grep '_timeout =' > smtp_connect_timeout = 30s > smtp_data_done_timeout = 600s > smtp_data_init_timeout = 120s > smtp_data_xfer_timeout = 180s > smtp_helo_timeout = 300s > smtp_mail_timeout = 300s > smtp_quit_timeout = 300s > smtp_rcpt_timeout = 300s > smtp_rset_timeout = 20s > smtp_starttls_timeout = 300s > smtp_tls_session_cache_timeout = 3600s > smtp_xforward_timeout = 300s > > You could probably raise your timelimits. > > However, if your outbound server is regularly not keeping up with > the lower timeouts you quote, you really need to fix that. > > -- > Viktor. > -- Dr. Ed Morbius Chief Scientist / Philologist / Robot Wrangler / Powerplant Operator Krell Power Systems Unlimited
