A delivery loop was detected which causes this email to be undeliverable.

Operating System & Version
Windows 10 Pro latest
cPanel & WHM Version


Mar 17, 2021
South Africa
cPanel Access Level
Root Administrator
So I am working for a company and they use Google Suite as a workspace to manage emails. However, we use cPanel as well for email forwarding.
I came across an error " A delivery loop was detected which causes this email to be undeliverable. " on an email that was created a long time ago on cPanel. The forwarding email worked and stopped working at some time. There are two emails configured to forward to, but only one work. I checked the forwarding email and tried to detect the problem why it keeps detecting a loop, but I can't seem to figure it out.

I have also noticed that since we are using Google Suite, creating new Cpanel email accounts' inboxes doesn't work.

How can I fix this issue? And where can I see the list of emails configured to be forwarded to? I have already checked Email Forwarders in Cpanel, and there's n email, but it simply does not forward to that email, instead it forwards to a different one.
Last edited by a moderator:


Jurassic Moderator
Staff member
Oct 19, 2014
cPanel Access Level
Root Administrator
Hey there! The best place to check for forwarders if you aren't finding them in the interface would be in the /etc/valiases/domain.com file. That will store any forwarders for the domain.

You could also try checking the /var/log/exim_mainlog file directly to see if you can get more details on how the specific email is being processed.