Configuring mail command to use msmtp

msmtp is successfully installed and works fine to send emails via an external SMTP server. However the mail command fails to send emails using *GNU Mailutils* on a Debian 10. for example echo "Test" | mail personal@external.email returns mail: cannot send message: Process exited with a non-zero status and echo $? returns "36" I'm supposing this is a msmtp is not integrating with the mail command. How do I configure mail to send messages through msmtp? EDIT: The programs seem to be communicating because the keyring prompt pops up and the login options are set only in ~/.msmtprc