smtpd_tls_cert_file = /etc/letsencrypt/live/domain.com/fullchain.pem
smtpd_tls_key_file = /etc/letsencrypt/live/domain.com/privkey.pem
smtp_tls_cert_file = /etc/letsencrypt/live/domain.com/fullchain.pem
smtp_tls_key_file = /etc/letsencrypt/live/domain.com/privkey.pem

web_service2='postfix'
/usr/sbin/service $web_service2 reload