Java Mail, diff. domain

[Sunil K Bansal]

Hi Guys,
I am using java mail Api to send mails.
I m using my proxy server's settings for that.
I can send mails.
but let us say my domain name is abcd.com
i can send mails to only where email id ends with abcd.com
but if i change it to anyother like my hotmail id the following exception is thrown
Sending failed;
nested exception is:
javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
javax.mail.SendFailedException: 550 5.7.1 <[e-mail]>... we do not relay <[e-mail]>
but could be the reason and what is the solution.
Thanks in Advance..
Sunil Bansal

[Nicholas Turner]

Well I'm not an expert nor do I think this is the answer but...
I found that if you send java mail for instance

[e-mail] is really [e-mail] it wont work but when i sent it to the .net it worked. I believe you have to do something for naming resolutions. Sorry I couldnt be more help

[Bear Bibeault]

That means that that SMTP server has turned "relaying" off -- meaning it will only allow you to send mail from the domains that the SMTP server allows. This is usually to prevent spammers from using the server to relay their e-mails at someone else's cost.
Someone more familiar with SMTP could probably elaborate further.
hth,
bear