BT, Talk 21 and Others Hate Zoho

BT, Talk 21 and Others Hate Zoho

I have had enough as a company we have been having emails not getting through to clients for weeks. I have surfed the forum done the DMf and all the other stuff suggested by helpful forum users. Thanks to them and no thanks to Zoho. Thought we had solved the problem but we are still having no luck. We are big Zoho Crm users so we pay our money.
I would like one straight answer. If this is going to continue or be a regular thing please let me know and we will move our email else where, email is so fundamental to our business we cannot have a system that is flaky.