tmpmail
A temporary email right from your terminal written in POSIX sh.
TLDR
Create a temporary inbox
$ tmpmail --generate
List messages and their numeric ID
$ tmpmail
Display the most recent received email
$ tmpmail --recent
Open a specific message
$ tmpmail [email_id]
View email as raw text without HTML tags
$ tmpmail --text
Open email with a specific browser (default is w3m)
$ tmpmail --browser [browser]