sSMTP

sSMTP - Simple SMTP

sSMTP is a simple MTA to deliver mail from a computer to a mail hub (SMTP server). sSMTP is simple and lightweight, there are no daemons or anything hogging up CPU; Just sSMTP. Unlike Exim4, sSMTP does not receive mail, expand aliases, or manage a queue.

Setting up

/etc/ssmtp/ssmtp.conf

# For My SMTP relay server
AuthUser=alang@domain.com
AuthPass=ThisIsPassword
FromLineOverride=YES
mailhub=smtp.domain.com:587
UseSTARTTLS=YES