Execute Add the following to update the bottom of '''/etc/postfix/main.cf''':{{CodeText|sudo postconf -e 'relayhost<nowiki>=</nowiki>[smtp.gmail.com]:587'sudo postconf -e 'smtp_sasl_auth_enable<nowiki>=</nowiki>yes'sudo postconf -e 'smtp_sasl_password_maps<nowiki>=</nowiki>hash:/etc/postfix/sasl_passwd'sudo postconf -e 'smtp_sasl_security_options<nowiki>=</nowiki>noanonymous'sudo postconf -e 'smtp_tls_CAfile<nowiki>=</nowiki>/etc/postfix/cacert.pem'sudo postconf -e 'smtp_use_tls<nowiki>=</nowiki>yes'}}