deanna23 on "[Plugin: Configure SMTP] SMTP Error: Could not connect to SMTP host."

Hello
I have yahoo mail that I would like to use for this plug-in. I am not sure I am entering in the right information or enough information on this plug- in page. I am currently getting this error: "SMTP Error: Could not connect to SMTP host."
is there a place to look for the info for my yahoo mail that needs to be entered? I did some searches on google and followed some other instructions, but they obviously did not help because I am getting this error.
any advise would be greatly appreciated.

http://wordpress.org/extend/plugins/configure-smtp/