Receiving duplicate emails

Question

Why am I receiving duplicate emails?

Answer

This is typically caused by the sender sending multiple copies of the same email. You can verify this by checking the email headers and looking for a unique ID for each duplicate email. The following support article provides details on how to find the email headers:

How to find email headers

If the Exim ID is different, they are separate messages, and both IDs should be examined in the Exim logs.

If they have the same Exim ID, you can confirm whether the messages were delivered at the same time by checking the Delivery-Date header. That timestamp can be compared to the Exim logs.

How to use exigrep to search the Exim logs