hey friends, I have configure one mail server in my company Postfix+Dovecot+fetchmail+Squirrelmail. I am authentication my Mail Server with the ISP mail server so that the mails for our domain are not treated as spam. I have given this kind of configuration in the postfix main.cf file smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = noanonymous the file sasl_passwd contains entry lik ethis smtp.mailserver.com username:password How can i check whether this is working fine or not. I did sent one test mail to gmail account but there was nothing mention about the ISP mail server.One of the web based mail server indiatimes.com is rejecting my mails .If I try to send the mails to indiatimes.com it is rejecting mymails saying to=<ankush174@xxxxxxxxxxxxxx>, relay=smtp.indiatimes.com[203.199.93.5], delay=2131, status=deferred (host smtp.indiatimes.com[203.199.93.5] refused to talk to me: 554 ipc601.indiatimes.com) Please tell me how to check whether the authentication with the ISP mail server is working properly. The user in the sasl_passwd database is the catchall mailbox.I have done this also postmap /etc/postfix/sasl_passwd it created sasl_passwd.db in the /etc/postfix directory. Thanks & Regards Ankush