Hi, I installed the server with apache2 following this https://www.howtoforge.com/perfect-...l-php-pureftpd-postfix-dovecot-and-ispconfig3 everything is working really great. however because i am running my server on comcast residential isp, i had to change the configuration in roundcube to use comcast relayhosts. so now roundcube works great and i can send emails. however when i go into outlook and i try to send emails it wont work unless i also put the smtp of comcast relay in there but i dont want to do that as its my laptop and when i travel and i am not on comcast internet connection those relay hosts options wont work. is there a way to setup an email client that it will connect to the server and whatever is already set in the server configuration as a relay through comcast that should work without having to put those setting also in outlook? someone posted to try this nano /etc/postfix/main.cf relayhost = [smtp.comcast.net]:587 smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = save and close main.cf file nano /etc/postfix/sasl_passwd smtp.comcast.net comcastuser:comcastpassword save and close chown root:root /etc/postfix/sasl_passwd chmod 600 /etc/postfix/sasl_passwd postmap /etc/postfix/sasl_passwd postfix reload so i tried this but it still doesnt work? what can i do?