- If you have a message stuck in your queue and you want to see why it is there run exim -Mvl. I’m assuming “vl” is short for “view log”.
- In alias files or in the main config file you can use :fail: as an address to force a failure. Under certain convoluted circumstances this can be quite helpful.
- When running as root the -d option is a life saver. Running -d 9 with the -bv option can really help you understand how mail is delivered on your system.
- The -C option is important for testing changes with out interrupting the live config. This with -bv is really nice.
- The -brw command line option lets you see exactly how an address will be rewritten.