Email Configuration Settings

Hi I am trying to configure the email sending using sap.

I followed the steps to configure this

http://help.sap.com/saphelp_nw70/helpdata/en/55/a8b538891b11d2a25a00a0c943858e/frameset.htm

Later, try to send an email, and the email stays in Transit State

In the Overview or send orders, the email are displayed, with status Waiting, and error 751, the text says "message cannot currently be transferred to node STMP due to connection error"

My question is, I am trying to use our email service, the smtp server es smtp.bizmail.yahoo.com or our client email server empresa.com

Both smtp servers have a account with an password, in the guide I can not found where I could put the password. Why??

I think the problem is that, Could you help me?