#1 Could not send to @yahoo and @hotmail

[Sheares]

Hello Brent,

I have been using PHPMailer classes for a while. Many
thanks for your contribution.

I have a problem that PHPMailer could not send emails
to @hotmail and @yahoo accounts. And I have no
problem sending to other valid domains. The version that
I am using is 1.60 and 1.50. Appreciate if you advise on
this issue.

Thanks.
Sheares