msmtp Configuration for GMail

msmtp_gmail.conf

# Set default values for all following accounts.
defaults

host  smtp.gmail.com
port  587
timeout  off
protocol  smtp
domain  localhost

# /usr/bin/msmtp --version
#  plain cram-md5 digest-md5 gssapi external login ntlm
auth  on
user  GMAIL-USER
password  GMAIL-PASSWD

tls  on
tls_starttls  on
# WARNING: When the checks are disabled, TLS/SSL sessions will be vulnerable to man-in-the-middle attacks
tls_certcheck  off

logfile  /var/log/msmtp.log
###syslog  on

# A system wide configuration is optional.
# If it exists, it usually defines a default account.
# This allows msmtp to be used like /usr/sbin/sendmail.
account default

# Construct envelope-from addresses of the form "[email protected]".
###auto_from on
from  USER@DOMAIN
maildomain  DOMAIN