Postfix User wrote
> After I fix both problems I will post a new postconf -n output.
I removed completely check_sender_access, it is not required anymore.
Wietse Venema wrote
> Is your server MX host for domains that are delivered to a different
> mail server?
> If not:
> Set relay_domains to empty.
> If yes:
> DO Specify ONLY THOSE DOMAINS in relay_domains
> DO specify ONLY THOSE recipients in relay_recipient_maps
>
> DO NOT specify virtual (alias or mailbox) stuff in relay_domains
>
> DO NOT specify virtual (alias or mailbox) stuff in relay_recipient_maps
>
> DO specify virtual alias DOMAINS in virtual_alias_DOMAINS.
After specifying virtual_alias_domains, all messages sent from remote to
local addresses are answered with error bounce message "User unknown in
virtual alias table". I removed this line temporarily, and I set
relay_domains to empty.
At the moment all works like expected, except the backscatter problem. This
is latest postconf
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
dovecot_destination_recipient_limit = 1
inet_interfaces = all
inet_protocols = ipv4
mailbox_size_limit = 0
message_size_limit = 102400000
milter_default_action = accept
milter_protocol = 2
mydestination = localhost
myhostname = domain.com
mynetworks = 127.0.0.0/8
non_smtpd_milters = inet:localhost:8891
readme_directory = no
recipient_delimiter = +
relay_domains =
relayhost =
resolve_numeric_domain = yes
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_milters = inet:localhost:8891
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated,
reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_tls_CAfile = /etc/ssl/certs/domain.com.chain.crt
smtpd_tls_cert_file = /etc/ssl/certs/domain.com.crt
smtpd_tls_key_file = /etc/ssl/private/domain.com.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
virtual_alias_maps = mysql:/etc/postfix/sqlconf/virtual_mailbox_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/sqlconf/mydestination.cf
virtual_transport = dovecot
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