Hi, I am new to Linux/Ubuntu OS. I have installed Ubuntu 10.04 with Postfix and Dovecot for IMAP. I can send emails out to external account (e.g. yahoo) with no problem. The problem is I can not receive emails from external account such as yahoo. Even more strangely, I can not receive emails internally within my domain. I was wondering if anyone would be kind to check my main.cf as follows #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = /usr/share/doc/postfix # TLS parameters #smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem #smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key #smtpd_use_tls=yes #smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache #smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. # myhostname = Ubuntu-MailServer.www.mycompany.com.au myhostname = www.mycompany.com.au alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases # myorigin = /etc/mailname myorigin = mycompany.com.au # mydestination = www.mycompany.com.au, Ubuntu-MailServer.www.mycompany.com.au, localhost.www.mycompany.com.au, localhost mydestination = www.mycompany.com.au, localhost relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all home_mailbox = Maildir/ html_directory = /usr/share/doc/postfix/html I have also found some warnings from mail.log as follows Oct 22 02:30:02 Ubuntu-MailServer postfix/smtp[19995]: warning: host www.mycompany.com.au[152.56.77.100]:25 greeted me with my own hostname www.mycompany.com.au Oct 22 02:30:02 Ubuntu-MailServer postfix/smtp[19995]: warning: host www.mycompany.com.au[152.56.77.100]:25 replied to HELO/EHLO with my own hostname www.mycompany.com.au Oct 22 02:30:02 Ubuntu-MailServer postfix/smtp[19995]: 4CF6DC0542: to=<[email protected]>, relay=www.mycompany.com.au[152.56.77.100]:25, delay=0.07, delays=0.03/0/0.04/0, dsn=5.4.6, status=bounced (mail for mycompany.com.au loops back to myself) I wonder if anyone might be able to tell me what went wrong and how to work around this. Any help would be greatly appreciated. Thank you in advance
