Hi Guys, Wonder if anyone can shed any light on this. I have 2 servers one which uses a postfix relay to the main postfix email server. This all works great (thanks for the tutorials Falko) however I have noticed on the email server when emails are sent via the relay: Code: example.com = x.x.x.1 = relay mail.example.com = x.x.x.2 = postfix email server postfix/smtpd[xxx]: warning: x.x.x.1 address not listed for hostname mail.example.com As I understand it; it's because the reverse dns of x.x.x.1 doesn't equate to mail.example.com however as it's connecting from the relay shouldn't be trying a lookup of x.x.x.1 to example.com not mail.example.com? It's not a biggie as it's all working but I would like to understand whats happening and fix it if possible. Thanks Luke
No: example.com = x.x.x.1 = relay mail.example.com = x.x.x.2 = postfix email server example.com[x.x.x.1] is my webserver which relays emails to the postfix on mail.example.com[x.x.x.2]
example.com[relay]: Code: smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no myhostname = example1 alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = localhost.localdomain, localhost relayhost = mail.example.com smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = mynetworks = 127.0.0.0/8 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all readme_directory = /usr/share/doc/postfix html_directory = /usr/share/doc/postfix/html mail.example.com[mail server] Code: smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no # TLS parameters smtpd_tls_cert_file=/etc/postfix/smtpd.cert smtpd_tls_key_file=/etc/postfix/smtpd.key smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache myhostname = mail.example.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = mail.example.com, localhost.localdomain, localhost relayhost = mynetworks = 127.0.0.0/8 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all #Virtual Setup virtual_alias_domains = virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_mailbox_base = /home/vmail virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf virtual_create_maildirsize = yes virtual_mailbox_extended = yes virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailbox_limit_maps.cf virtual_mailbox_limit_override = yes virtual_maildir_limit_message = "The user you are trying to reach is over quota." virtual_overquota_bounce = yes proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps header_checks = regexp:/etc/postfix/header_checks content_filter = amavis:[127.0.0.1]:10024 receive_override_options = no_address_mappings readme_directory = /usr/share/doc/postfix html_directory = /usr/share/doc/postfix/html
have you tried using the IP of the main server or adding an entry to the /etc/hosts file? Can you ping mail.domain.com from the relay server?
Hi sjau Yep you can ping mail.example.com from the relay server. Just to clarify again - everything works ok and email sent from the relay is delivered. I just get a weird warning on the mail server, which I would like to understand & if possible fix. Can you clarify about putting an entry in the /etc/hosts file? Did you mean on the mail server? Kind Regards Luke
Can you change Code: myhostname = example1 to Code: myhostname = example.com on the example.com server? What's in /etc/mailname on both servers?
I changed the /etc/hostname & the myhostname to example.com - fingers crossed I think that sorted it. /etc/mailname was example.com in both so I adjusted the mail server to be mail.example.com as well anyways. Many thanks for your time with this. Luke
