I have to say you might want to look into NOT using the WOW servers.
I had so many like issues with WOW email I just bought my own domain name and 6 email boxes. This is like $35/year and you might be able to find one cheaper as well. Having your own domain and being able to have whatever email name you choose is well worth $35/year to me. I no longer use WOW servers for anything except email from WOW.
I could also drop WOW and WOW, I still have the same email addresses.
You can do this with some other free service but really, getting your own domain is not very expensive.