Install mailcheck by entering the following commands in the terminal:
sudo apt update sudo apt install mailcheck
Description:
Check multiple mailboxes/maildirs for mail
Mailcheck is a simple, configurable tool that allows multiple mailboxes to be checked for the existence of new mail messages. It supports both mbox and maildir-style mailboxes for compatibility with most mail transport agents. It also supports remote POP3 and IMAP mailboxes. . Homepage: http://mailcheck.sourceforge.net/
Homepage: http://mailcheck.sourceforge.net/
Version: 1.91.2-2build1
Section: universe/mail