I still use the mutt email client when I’m remoted into some of my FreeBSD servers. It might not be the most eye pleasing email client ever, but it’s powerful, lightweight and fast.

Mutt has a very powerful feature that allows you to tag messages via regular expressions. It has a couple of special pattern modifiers that allow you to apply the regex to certain mail headers only. I can never remember so I’m starting a list of the ones I tend to use most in the hope that I’ll either remember them eventually or can refer back to this post. The full documentation can be found here, so this is only a cheat sheet that reflects my personal usage of the mutt regex pattern modifiers.

~f - match from

~t - match to

~c - match cc

~C - match to or cc

~e - match sender