SOLVED How to set username that owns the recipient's email address

[martin MHC]

After my previous query regarding confirming the blocking of port 143 (which works), I have another possibly related issue:

I can not send or recieve emails from my email client. Checking the Mail Delivery Reports this comes back with some change that's happened but I can't find how to revert it:

Emails sent via webmail are being delivered just fine.
Emails sent via the email client (thunderbird) are being claimed as sent by the application but are not being sent by the server.

The Mail Delivery Report states that these two emails to the same recipient have a single key difference:

Delivery User:

-remote-

For successful emails sent

And

Delivery User:

-system-

for more recent unsuccessful emails.

This is defninitely the cause, what's caused it and how can I revert this issue? I have NOT changed any setting in my Thunderbird so assume it's a global setting on the server somewhere but can't find it.

Many thanks!

 

[martin MHC]

The issue was found that an erroneous blocking of Port 25 in the TCP_IN/OUT firewall caused emails to cease.
The reason the ownership was adjusted was found here; What does "[System]" mean in Mail Queue Manager?

Where System is the owner of the automated message response generated by Exim itself.

Cheers

 

[cPRex]

I'm glad you were able to track that down and get the mail working :D