There is no Help | Send Feedback in WinMail, and if there were they would
just dump it as they did in OE.
The only way to effectively complain to MS is to phone them and keep them on
the line as long as possible. That way they have to log the complaint.
Complaining in this NG does nothing with respect to MS.
You can contact MS directly at:
Microsoft Corporation
One Microsoft Way
Redmond, WA 98052
US
You need to enter the correct server names and settings.
Your email account provider has that information.
They should have a help page on their website.
If you tell us who provides your email account, perhaps someone can assist
you.