On 8/5/2013 9:09 AM, Charles Marcus wrote: > On 2013-08-05 9:21 AM, Noel Jones <njo...@megan.vbhcs.org> wrote: >> Set those three limits to 100 or higher. Those controls are >> intended to prevent random clients from wasting your time. Since >> you don't allow connections from random clients, it's safe to >> increase them. >> >> # main.cf >> smtpd_hard_error_limit = 100 >> smtpd_soft_error_limit = 100 >> smtpd_junk_command_limit = 100 > > Thanks Noel... I'll do this, unless I can get them to change their > VRFY service to properly close these connections - or stop using a > MAIL FROM that is in my domain name for their SMTP RCPT TO option so > we could use that option. > > Same question to you though - do you think that *not* closing VRFY > probes/connections properly is improving their performance in any > meaningful way? >
Depends on the volume. At high volume if they can batch up recipients and VRFY a bunch in one blast it would help. OTOH, if the connection is just sitting there idle for 5 minutes between each VRFY, not likely much difference. But that assumes everyone has fast transaction startup... And this depends on their software too. Maybe they've optimized for lots of open idle connections, and I can imagine some random MTA might take a long time to set up an SMTP transaction. I don't suppose an open idle connection from an somewhat authorized client will bother anything, so just go with it. -- Noel Jones
