I have a machine running Ubuntu server 8.04 with all the services I configured running ok. I use webmin to do my configurations and also have a dyndns hostname for the server. I can send and receive emails with postfix on the server. I have a client machine which has Thunderbird setup to send and receive mail through the server. The problem is that, I can only relay emails from my dyndns hostname only. I cannot send other domain emails like gmail ( if I setup the from email in thunderbird as [email protected] it sends but not [email protected]) Someone told me this is because by default ubuntu server is not an open relay server. Is there a way I can allow certain domains to send emails through? Your help will be appreciated.
Still not workinh. Here's error from my mail system log Jun 3 16:55:53 dalitso postfix/smtp[19484]: 73C9E2A58F: to=<[email protected]>, relay=smtp.isdsl.net[196.26.208.197]:25, delay=181, delays=0.02/0.01/1/180, dsn=5.0.0, status=bounced (host smtp.isdsl.net[196.26.208.197] said: 550-Service unavailable; Sender address [[email protected]] blocked using 550 sdom.bl.isdsl.net ; Access denied (in reply to RCPT TO command)) Jun 3 16:55:53 dalitso postfix/cleanup[19540]: 939EB2A5C5: message-id=<[email protected]> Jun 3 16:55:53 dalitso postfix/qmgr[6742]: 939EB2A5C5: from=<>, size=2624, nrcpt=1 (queue active) Jun 3 16:55:53 dalitso postfix/bounce[19539]: 73C9E2A58F: sender non-delivery notification: 939EB2A5C5 Jun 3 16:55:53 dalitso postfix/qmgr[6742]: 73C9E2A58F: removed
Not only gmail addressess, any address other than my dyndns address. Only my dyndns address can be relayed. I have also tried other relay servers but they are still blocking. How can I solve this?
Here's my postfix main.cf smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_use_tls = yes smtpd_tls_session_cache_database = btree:${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. alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = localhost.mine.nu., localhost, dalitso.mine.nu relayhost = smtp.isdsl.net mailbox_command = procmail -a $EXTENSION mailbox_size_limit = 0 recipient_delimiter = + virtual_alias_maps = hash:/etc/postfix/virtual mail_spool_directory = /var/spool/mail home_mailbox = Maildir/ mynetworks = 192.168.1.0/24 127.0.0.0/8 192.168.0.0/24
You might have to use authentication for the relayhost - see http://www.howtoforge.com/postfix_relaying_through_another_mailserver
Thanks alot Falko, using authentication for the relayhost works! I was just wondering though, is this method supposed to make all email addresses relayable or only the one belonging to the authenticated user name and password? I noticed I can now relay my dyndns email address and the one I setup the authentication for but not the gmail address. My email I authenticate belongs to a different ISP from the one my adsl is subscribed to and I don't use my adsl ISP smtp. Can this be the reason?
