/home/<user>/.muttrc: --- snipp --- # Default sendmail call set sendmail="/usr/bin/esmtp" set envelope_from=yes --- snapp --- Give .esmtprc only the permissions 600! /home/<user>/.esmtprc: --- snipp --- # Configuration file for ESMTP. # Set SMTP host and service (port) hostname = SMTPSERVER:25 # Set the user name username = "USERNAME" # Set the password password = "PASSWORD" # Use the Starttls starttls = disabled --- snapp ---