HostOnNet Blog

CageFS PHP mail not working

Looking for Linux Server Admin or WordPress Expert? We can help.

On CloudLinux server running sites under CafeFS, one of the customer can’t send email. I created a test PHP script, run on client site.

# cat mail.php

mail("[email protected]"," Online booking", "this is onlinebooking email");

No mail is send out.

Nothing in exim mail server log (/var/log/exim_mainlog).

I disabled CageFS, mail started working properly. Re enabled CageFS, it failed to work.

I enabled SSH for this customer, then login to SSH, run the mail.php from SSH prompt, got following error

uzbekistanconsul@server20 [~/public_html]# php mail.php 
/bin/cat: /var/.cagefs/.cagefs.token: Permission denied
You are not authorized to run this command
uzbekistanconsul@server20 [~/public_html]#

NOTE: never run as user root, i know this warning is silly 🙂

This error shows up only if mail() is last line in the mail.php, for example, if you have an

echo "mail send";

Line after mail(), that does not shows up. I found out that by accident or i because i am lucky!

To fix this problem, you need to find the .csgefs.token for this site. So as user too, run

root@server20 [~]# find /var/cagefs -name "uzbekistanconsul"
root@server20 [~]# 

We found the cagefs skelton directory for the site is


I went to the .cafefs folder and checked file, it had a wrong owner.

root@server20 [/var/cagefs/46/uzbekistanconsul/.cagefs]# ls -la
total 12
drwxr-xr-x 2 root nobody 4096 Oct 27 05:33 ./
drwxr-x--x 6 root root   4096 Oct 27 05:33 ../
-r-------- 1 1646 nobody   16 Oct 27 05:33 .cagefs.token
root@server20 [/var/cagefs/46/uzbekistanconsul/.cagefs]#

Fixed it by running

chown uzbekistanconsul:nobody /var/cagefs/46/uzbekistanconsul/.cagefs/.cagefs.token

Posted in Cpanel Server

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.