I'm attempting to setup a postfix relay system for my LAN. A lot of my services are blocked from WAN access and I want to be able to get notifications from them.
As it stands it currently "works" but each e-mail is accompanied by a "Mailer Deamon Undeliverable" e-mail because it's sending correctly but always trying to BCC: [email protected] which doesn't resolve. I only use @domain.com for e-mail.
Here is my config for a "guest" VM (sends via the relayhost), I've tried a bunch but am out of ideas any help is appreciated.
I wonder If I can fix this somehow in the relayhost vs the guests?
/etc/postfix/main.cf smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination myhostname = domain.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = domain.com mydestination = domain.com, localhost relayhost = smtp.domain.com mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = loopback-only inet_protocols = all masquerade_domains = domain.com #THINGS I HAVE TRIED...## #smtp_header_checks = regexp:/etc/postfix/header_checks #transport_maps = hash:/etc/postfix/transport #smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/bad_recipients, permit_mynetworks, reject_unauth_destination, permit #transport_maps = pcre:/etc/postfix/transport_maps #smtp_generic_maps = hash:/etc/postfix/generic /etc/aliases postmaster: root root: [email protected] trash: /tmp/mail.trash 