sending email outside from sendmail
I just set up a mail server using using sendmail.
I dont have a registered domain name but i am using a
dyndns account and have set it up to forward mails.
I am able to recieve mails from outside ( from hotmail, yahoo etc.)
but i can't send mail outside ( to hotmail, etc).
any one has an idea as to what i am doing wrong?
any tutorials on such a senerio?