Sendmail mail queue backed up



Sendmail is not my favorite MTA. I really prefer Postfix, but… I have to use sendmail in a few situations. I’ve run a little script on the web server for a good while to monitor the mail queue. I was running into a problem where I had LOTS of messages backed up. I suspected I had been hit originally by a spam onslaught which had flooded the server and it had been throttled (VPS) to prevent causing problems for the other users and things got backed up.


The script I’ve used looks like this

#!/bin/sh
# mailalert.sh

threshold=20
currentnum=`ls -l /var/spool/mqueue/qf* | wc -l`

if [ $currentnum -gt $threshold ]
then
datestamp=`date`
mail postmaster -s “Mail Queue Alert” <<EOM

There are $currentnum messages in the mail queue on

$datestamp

Check /var/spool/mqueue

EOM
fi

It basically checks to see if there are more than 20 messages queued… so here are some ways to deal with the mailqueue in sendmail from the shell.

mailq shows all the messages that are currently queued waiting for a re-attempt.

sendmail -q starts processing the message queue. Most all of the messages backed up were because my home server had rejected the sender (using some of postfix’s UCE controls…) sendmail couldn’t deliver them and can’t deliver a bounce (forged message). I probably need to investigate how I might tighten the sendmail policy on not accepting from bogus addresses.

It’s possible though to delete items out of the queue by deleting them from /var/spool/mqueue Eventually, sendmail should give up on a message though and stop trying to deliver it or it’s bounce. (Don’t recall the default number of days.)

Related Posts

Blog Traffic Exchange Related Posts
  • Modern Computer Viruses are almost NEVER from whom they claim to be from This is one that I've probably talked about before, but it's worth rehashing because of a call I had this afternoon. A customer had been receiving phone calls and email messages from folks asking that he stop sending them a virus. Essentially all of the viruses were claiming to be......
  • Microsoft Outlook - duplicate email messages Part II This is part II, click here for part one of the saga... Okay, so I revisit to install Microsoft Office 2003 SP2 and hope that solves it. Somewhere along this time, I had also found a suggestion of removing the entire mail PROFILE and creating a new one. *(The theory......
  • Asheville based Web Design, VPS Hosting and SEO Services [/caption] Change is constant. The last couple of years I have been doing less onsite computer service. Health has been one large reason for that. I have been focusing on other things though. One of the things that I've been working on is now going live. I've redesigned my web......
Blog Traffic Exchange Related Websites
  • The Web Hosting Services Of The Hostgator Review Thousands and thousands of web hosts scattered around the world and their business aim is simple - to get recognized and make profit. With so much noise around the web hosting industry, it is a tough task for us to pick up the right hosting. Nevertheless, it's not too hard......
  • Web Hosting Tips for New Bloggers This is a guest post! If you want to write for us, Contact using the Contact Me form. With increased internet users, people are trying to make their presence on this World Wide Web in one or the other way. With blogging creating a platform for millions of writers who......
  • How To Pick Out A Reliable Web Hosting Service For Your Website Selecting the correct web host can either make your website grow or tear it down. This is because the web host should be considered to be the foundation of your website. In order to have a longer term website and make sure you provide a good experience for your web......
PDF24    Send article as PDF   

Similar Posts


See what happened this day in history from either BBC Wikipedia
Search:
Keywords:
Amazon Logo

Comments are closed.


Switch to our mobile site