We have a business which relies on quick communication with customers.

I have recently noticed lots of emails coming from hotmail accounts being delayed by up to 48 hrs before they arrive in our business inbox.

I have just done a test with my own hotmail account.  I sent an email to our business, it has still not been delivered, and I sent an email to my Gmail account - it was delivered instantly.

Has our business email been put on a blacklist somewhere?  How do I go about solving this?

Many thanks in advance for all help.

Claire