Hi, complete newbie (to both Linux and IT) intern here.

I'm working on a few servers running centos and using postfix. I don't know what the exact problem is, but we are having problems with the disk space being maxed out at 100 gigs.

What we think the problem is...is that postfix is either caching or logging all the emails we send out. We sent 250k emails (500kb apiece) over the weekend and we were having trouble with that quantity. It seems some of those email were queued up for retry sending...but we didn't have sufficient disk space for that? Something broke - I'm not sure what.

What I want to do is to find and change the config file that has to do with postfix email retrying - possibly limit this (not sure if this will fix my problem). Or, turn off /limit any way that postfix logs/caches emails so that it won't take up all the disk space when queued up for retry...

Again, I'm totally lost here (on both what's going on, and how to fix it). I'm not sure what more information is needed to address this problem, so please ask me so I can get it!

The first thing you should do is establish where the space is being used up, 100g is pretty extensive for 250k messages even at 500kb each... that totals out to about 62gb. Use the du -sh and du -sh * commands to establish where the space is being used.