Mouss: I deleted /var/log/maillog file, rebooted the system and tried to send the email from (using Win XP PC) the web site. Same error message.
I checked the log file "/va/log/maillog", no error message logged (see below). I assume this the log file where Postfix logs messages. Then I check any new email for account [EMAIL PROTECTED] I received confirmation that there was no message for this account on the server. I normally use MS Outlook to check messages but for this test I used Thunderbird. In the logs, it does show that there is an inquiry to check new messages for the above email account. Any other suggestions are highly appreciated! Kirti Jul 24 15:03:51 www dovecot: Dovecot v1.1.1 starting up Jul 24 15:03:53 www postfix/postfix-script: starting the Postfix mail system Jul 24 15:03:53 www postfix/master[4792]: daemon started -- version 2.3.3, configuration /etc/postfix Jul 24 15:07:37 www dovecot: pop3-login: Login: user=<contactus>, method=PLAIN, rip=192.168.0.64, lip=65.103.190.105, TLS Jul 24 15:07:37 www dovecot: POP3(contactus): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0