PHPMailer，表单域中的错误，带减号

I have a problem with PHPMailer.. I sent mail with:

$mail->SetFrom('cipcirip@cipcirip.com', 'cip-cirip');

and I give mail on gmail and I send mail with:

$mail->SetFrom('cipcirip@cip-cirip.com', 'cip-cirip');

and I don't give the mail... the real adress is cipcirip@cip-cirip.com

I think phpmailer doesn't care and the problem is in the MTA. It is possible that it refuses to send from anywhere but cipcirip.com if that's your domain name.