Hi folks, i got this when i check my postfix logs everything was alright i didnt make any changes in my server just some iptables now when i send an text email everything is ok and the status of email is sent the problem when i send an email with any hyperlink my dsn=5.0.0 bounced! HTML: Jan 26 15:58:31 mail postfix/smtp[2075]: D4B1024C21: to=<[email protected]>, relay=mailin-02.mx.aol.com[64.12.137.162]:25, delay=0.62, delays=0.1/0.01/0.32/0.2, dsn=5.0.0, status=bounced (host mailin-02.mx.aol.com[64.12.137.162] said: 550 Action not taken (in reply to end of DATA command)) Here is output of post HTML: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 header_checks = regexp:/etc/postfix/header_checks home_mailbox = Maildir/ html_directory = no inet_protocols = all mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man milter_default_action = accept milter_protocol = 2 mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = mydomain.co myhostname = mail.mydomain.co mynetworks = 127.0.0.0/8, myip myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix non_smtpd_milters = $smtpd_milters readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_banner = $myhostname ESMTP $mail_name ($mail_version) smtpd_milters = inet:127.0.0.1:8891 unknown_local_recipient_reject_code = 550 virtual_transport = dovecot Any suggestions?