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.