This will not be much consolation but I have had similar problems.Because I could not resolve I ended up just using one email system (the one provided by my ISP).I have had some unfortunate experiences trying to run a number of different email addresses at the same time.I have found there to limitations on all and also conflicts arise.I was of the view that this was due to my inexperience and there must be a way around these issues.Perhaps there are solutions and I will eventually discover what these are but in thr interim will follow closely what replies you get.