eM Client Will Not Accept Password

All of a sudden, eM Client will not accept my password. Worked fine yesterday, but today not! Suggestions, please!


The startup protected password?

I don’t understand. Please clarify!

After looking at some previous similar issues, I think I’ve encountered this previously but assume that the password in question is my “log-on protected password”! I’m getting a drop-down window saying "Server says “LOGIN invalid credentials”. Hope this helps!