Exim comes with a utility called “exiwhat” which will display what each instance of exim is currently involved with.
exiwhat
The output will look similar to this
![exim mail server exiwhat](https://serverok.in/wp-content/uploads/2020/11/exiwhat.png)
To monitor the exim log in realtime, you may use the tail command
tail -f /var/log/exim_mainlog
See Exim, exiwhat