>> Count the number of messages in the queue.
root@localhost# exim -bpc

>> Listing the messages in the queue (time queued, size, message-id, sender, recipient).
root@localhost# exim -bp

>> Print a summary of messages in the queue (count, volume, oldest, newest, domain, and totals).
root@localhost# exim -bp | exiqsumm

>> Check what Exim is doing right now.
root@localhost# exiwhat

>> Test how exim will route a given address.
root@localhost# exim -bt user@localdomain.com