I'm surprised that you don't have errors in your maillog. Anyway, php mail() opens and closes an smtp socket for each message... not a big deal unless you're hosting several email accounts on the site, then you have to consider that smtpd is called for every inbound message, etc... So increasing qmail-smtpd max connections might help, but if you increase it too much you could thrash your server. Replacing the native php mail might be a better solution. Try this: http://pear.php.net/package/Mail or find another one. Floyd On Wed, Jun 11, 2008 at 6:57 PM, wrote: > Looking at the logs for a few of the times it occured: > > 13:38:06-- finished spam-assassin processing one message, started > another, local delivery. > > 12:39:34-- Recieved an inbound message from SMTP land > > 10:21:12-- A message finished 2 seconds previous, a POP3 connection 4 > seconds later. > > There's nothing that looks out of the ordinary. Maybe the 'sendmail' > program or whatever part of qmail it maps to hit some internal limit-- > "There are 5 running, don't start a new one?" > > -----Original Message----- > From: Floyd Arguello > To: Main PLUG discussion list > Sent: Wed, 11 Jun 2008 6:41 pm > Subject: Re: PHP mail() woes > > > > > > > > > > > What do your maillogs show? > > Floyd > > > On Wed, Jun 11, 2008 at 6:19 PM, wrote: >> >> Oh, to add more details: >> >> I tried writing test code which would loop and call mail(). >> >> Wether I did 20 or 50 iterations, or even running two of the page that >> did 50 at the same time, to a local address, it still all worked. >> >> I also tried sending 50 to "test@invalid.invalid" (since I didn't want >> it to bother a real host), and it didn't report any errors at the >> mail() function. >> >> So it's obviously not just a "number of messages being sent" thing-- >> the only thing I could see is to somehow monitor all 100+ sites hosted >> on the server to see if something hits a critical point. >> >> >> >> -----Original Message----- >> From: fouldragon@aol.com >> To: plug-discuss@lists.plug.phoenix.az.us >> Sent: Wed, 11 Jun 2008 5:44 pm >> Subject: PHP mail() woes >> >> >> >> >> >> >> >> >> >> >> Several sites on the VPS I administer send out several "order >> confirmation" emails when a specific page is hit. >> >> Because of the way they run their businesses, it's non-negotiable that >> between 3 and ~12 messages are sent out on these occurences. >> >> The problem is that occasionally--- probably about one in 20 times > such >> a page is accessed, the server error logs fill up with: >> >> [Wed Jun 11 13:38:06 2008] [error] [client a.b.c.d] PHP Warning: >> mail() [function.mail]: Could not execute >> mail delivery program '/usr/sbin/sendmail -t -i' in >> /var/www/vhosts/xxxxxxx/httpdocs/feedback.php on line 54, referer: >> http://xxxxxxxx >> >> Since it tries to send a handful of messages at once, they usually > come >> in clumps of 5 or 6 messages like this. >> >> I tried correlating the times of the errors with resource warnings in >> Virtuozzo; no dice. >> >> I keep hearing that the PHP mail() call is not intended for bulk >> mailing-- but less than 20 messages at a shot is not bulk as I see it. >> >> The only thing I could see is some sort of resource exhaustion... like >> it can only have xxx mail() calls in the air at once, and it exceeds >> that limit. >> >> The server runs FC6 with Plesk 8.3 on top, so the mail setup is qmail, >> but it uses xinetd. I saw a few notes about being able to tweak >> qmail-smtpd to open more instances, but I'm not even sure that's >> relevant to the problem (since mail() calls are coming from local). >> >> What about replacing /usr/sbin/sendmail -t -i with >> /var/qmail/bin/qmail-inject - someone suggested this? Would that have >> any possible difference? >> >> And what's a good way to find out if this will repeat, other than >> sitting and monitoring the logs for an error? >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >> >> >> >> >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >> > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > > > > > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss