What is Exim?
Exim is an open source Mail Transfer Agent(MTA) used in the Unix-like operating system. It is a program responsible for receiving, delivery routing and delivering e-mail messages. Mail Transfer Agent’s receives e-mail messages and recipient addresses from both local users and remote host performs creation and forwarding function deliver the messages to their destination.
Where is the Exim Mail Queue Located?
The Exim mail server has a number of command line options to locate the mail queue. The queue can be managed with the SSH commands.
Login to the server as a root user via SSH and use the command
This command displays the Exim mail queue.