Postfix qmgr process causes heavy overload on RHEL 6

A RHEL 6 Server running some web service not Email service.

This morning found under heavy I/O delay.

Try check it out by:

The Postfix qmgr process causes heavy overload, which doesn’t make any sense to me.

Have to check the mail queue.

which give me over 40K queued emails.

by reading them, here is same example:

It turn’s out that one of the cron job runs every minute did not have a proprietary MAIL to settings.

Then purge all old emails both postfix queue and local mail:

Just want make it more clean, I try to remove the postfix package:

The cron require at lease one MTA on system.
Because we had smart host Email internal.
I did install my favorite SSMTP inside of sendmail.

First Backup the /etc/postfix

Setup the /etc/ssmtp/ssmtp.conf, did small test.

Everything looks good.

Please notice the server is not serve as an EMail server.


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And they bought for $76 million.

I would say online storage/ Cloud Storage is the future.
$4.95/month with unlimited space and upload/download coast, there is nothing better than this for my Home Server ( with about 2 TB personal files).

And with EMC’s support, I will give it a 5 start from the secure side.

Only thing is there is no Linux client right now.
Hope it coming soon.