Hi All, I am configuring my Outlook Express for POP3 access. I am able to recieve mails but when i try to send i get the below mentioned error. The error is "The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'abc@xxxxxxxxxxx'. Subject '', Account: 'xxx.xx.xxx.xxx', Server: 'xxx.xx.xxx.xxx', Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for abc@xxxxxxxxxxx', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79" can someone please help in resolving this issue. its very Urgent Thanks Gautam