Install cyrus-clients by entering the following commands in the terminal:
sudo apt update sudo apt install cyrus-clients
Description:
Cyrus mail system - test clients
This package contains client tools to test the Cyrus IMAPd suite. It contains the mupdatetest, sivtest, smtptest, lmtptest, imtest and pop3test tools which can be used to interactively talk to a mupdate, Sieve, SMTP, LMTP, IMAP or POP3 server. The clients are fully SASL-enabled for authentication. . For more information, please see the cyrus-common package.
Homepage: http://www.cyrusimap.org/
Version: 2.5.10-3ubuntu1
Section: universe/mail