I am a long standing subscriber to Hotmail - I have a business which I have a website for, all emails sent from the domain of my website go automatically into the junk folder when I send test emails to Hotmail accounts. This seems to be the case for any new domains, as I've set up other sites previously and have had the same problem, as have colleagues.

My business is based in the labor market and I will only be contacting clients with whom I have had previous dealings and will under no circumstances be sending out blanket emails. It looks extremely unprofessional for my emails to appear in the junk folder. 

What is the criteria for emails to be filtered into junk and how would I procure my emails not be to be sent into Hotmail junk folders? 

Many thanks for your help.

Raj