dear I test my sendmail is working for this way [root@bigboy tmp]# telnet mail.my-site.com 25 Trying mail.my-site.com... Connected to mail.my-site.com. Escape character is '^]'. 220 mail.my-site.com ESMTP server ready # helo another-web-site.org 250 mail.my-site.com Hello c-24-4-97-110.client.comcast.net [24.4.97.110], pleased to meet you. # MAIL FROM:sender@xxxxxxxxxxxxxxxxxxxx 250 2.1.0 sender@xxxxxxxxxxxxxxxxxxxxxxx Sender ok #RCPT TO: user@xxxxxxxxxxx 250 2.1.5 user@xxxxxxxxxxxxxx Recipient ok #DATA 354 Enter mail, end with "." on a line by itself #Subject: Test Message Testing sendmail interactively . 250 2.0.0 iA75r9si017840 Message accepted for delivery #QUIT 221 2.0.0 mail.my-site.com closing connection Connection closed by foreign host. This mean my sendmail is working and after this i check file in /var/spool/mail/userfile i see mail whose i send. Now I try through Mail client (Squirrelmail) then I am anable to send mail. Ramesh Pat Ramesh Patel System Dept. Banasdairy, Palanpur(B.K.) E-Mail : ramesh@xxxxxxxxxxxxxxx Mobile : 94263 91295