All of a sudden, Live Mail can't send my outgoing messages, because it says my outgoing server address is incorrect.  I have checked my account settings and the address is correct there, but Live Mail shows it with an extra letter in the error report.   How can I fix this?

In the configure server information box, I need the following settings:

Server type:
Incoming server address:

outgoing server address:

Is this SSL or authentication, which box do I check.

I am using window 7, this question pertains windows live mail.


Thanks for any assistance. 
I'm trying to add a Yahoo mail account to my Windows Live Mail client and, in running through the wizard to add a new account, it is asking me to confirm the incoming server address and outgoing server address.  I know these things are normally fairly standard strings for each product but does anyone know the details I need to put in for a yahoo mail account?  Any help gratefully received.
Thanks.