homerun.telia.com

I have saved login and password that i cannot delete from the system. I do not remember adding it, I do not have any application connected to it, i do not have any saved profile for it. After deletion it is coming back like a freaking zombie.

format of user: mXXXXXXXX@homerun.telia.com

password: ******

How i can remove this permanently? Why i cannot remove it?