Simple(lite) SMTP for VPS

/etc/ssmtp/ssmtp.conf

root=marchenko.alexandr@gmail.com
mailhub=smtp.gmail.com:587
hostname=marchenko.alexandr@gmail.com
FromLineOverride=YES
UseSTARTTLS=Yes
AuthUser=marchenko.alexandr@gmail.com
AuthPass=*****

/etc/ssmtp/revaliases

root:marchenko.alexandr@gmail.com:smtp.gmail.com:587
mac:marchenko.alexandr@gmail.com:smtp.gmail.com:587

/etc/php5/fpm/php.ini, /etc/php5/cli/php.ini

;sendmail_path =
sendmail_path = /usr/sbin/ssmtp -t