Qmailer gets clogged

[tonysdesigns]

Hello fellow coders. I have a slight vBulletin emailer issue:

I have a pretty fast dedicated server(3ghz with 2 gigs of ram) that we rent from a datacenter and I run my board soley on it. It runs Linux Fedora and uses Qmail for it's mailer. I have almost 15,000 regged users and it receives around 7-8 million page views/mo. I am running 3.5.2 and when I do a mass newsletter HTML email(yes mine can do html through my vB), the mail queue on the qmailer gets pretty clogged up and slows down after 6,000 emails has gone out, then it slows wayyyy down. They seem to go, but take sooooo long

I run ./qmHandle -s to see how many mails are stuck

It takes sometimes 10 hours to get all the emails out of the queue and back to normal.

Anyone have any bright ideas on how can I fix something like this?

 

[thedaver]

Typically what happens in mail delivery of that sort is that some of the destination mail servers are busy and your queue begins to build. qmail (re-)tries on an exponentially delayed basis - can't give specifics...

So if you see that AOL is not acceptinng email right now, you'll see that those will remain in queue and may delay the smtpd daemon's ability to move to the next delivery.

You do have the ability to control how many qmail-send daemons are spawned in /var/qmail/control/.... the real challenge there is knowing your RAM usage in order to allow for the appropriate number of smtpd and send daemons to run concurrently.

You may find that you could get yourself another box(s) to assist with mail delivery by using smtproutes for outbound email delivery.

D.E.R. Management - IT Project Management Consulting

http://www.dermanagement.com/