msmtp: A simple SMTP client msmtp: msmtp: In the default mode, msmtp transmits a mail to an SMTP server (for msmtp: example at a free mail provider) which does the delivery. msmtp: msmtp: To use this program with your mail user agent (MUA), create a configuration msmtp: file with your mail account(s) and tell your MUA to call msmtp instead of msmtp: /usr/sbin/sendmail. msmtp: msmtp: