This seems to becoming a problem with the various data centres. I personally have two Zoho accounts one for my business and one we set up for a charity. We eventually moved the charity over to Connect wanted to use it for our members (external). After setting it up (every nice). I sent out joining emails only to have 5 bounce back talking about different data centres. Including mine. 

If Zoho is to grow more this is going to become more of a problem. We are all in the UK so I am not sure why we are on other data centres.

I would love to hear some solutions?