Allows you to search a variety of questions and answers
One way to fix this is as follows:
1. Login to your WHM as root and click on Exim Configuration Editor on your left.
2. Uncheck the box that says: Use callouts to verify the existence of email senders and Save.
3. Go back to the Editor and click the Advanced Editor button.
4. Do a search for sender/callout.
5. When you find it, delete 'callout' and leave only 'sender'. Save.
Prompt support, on New Years Eve of all days. Fixed issue within 10 minutes of submitting.
Best customer service I've encountered anywhere. Great product at a great price.
Thanks for the fast sollution, it was my fault since my original e-mail got somehow bugged and I didn't got the invoice mails.