Postfix Relay Access Denied

I've been having delivery issues on my server for a while, but only when sending to outside addresses, forwarding to my own email addresses does work. This issue has been lingering for long enough, have to solve it. Been searching online for "Postfix Relay Access Denied" and none of the solutions fixed it for me, although I did make a few changes.

I'm hosting on Linode. Here's my main.cf file

# See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination smtpd_recipient_restrictions = permit_sasl_authenticated permit_mynetworks reject_unauth_destination myhostname = mail.emergenceguardian.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = spiritualselftransformation.com, localhost, localhost.spiritualselftransformation.com, localhost relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all virtual_alias_domains = emergenceguardian.com shamanicattraction.com satrimono.com virtual_alias_maps = hash:/etc/postfix/virtual home_mailbox = mail/ 

What am I missing?

This server should 1. Forward emails to specific domains to my email account hosted elsewhere 2. Allow sending emails from my websites

Also, what difference does it make in mydestination if I write spiritualselftransformation.com or emergenceguardian.com? I don't know if it matters, but DNS for EmergenceGuardian emails are linked to ProtonMail.

And anything else you'd recommend tweaking?

Thanks

1 Answer

Turns out the issue was that my application was configured to send to the server's public address pointing to the public server IP, which was then denied. I had to either add the public IP into mynetworks, or configure the application to send to localhost.