The MX record defines where the emails are to be delivered to. Whilst the emails arrive at the destination, different MX records may have other features such as anti-spam and anti-virus solutions embedded to the mail server.
If you wish to combine the shared hosting emails with the Exchange 2013, please visit hosting emails and exchange.
For the shared hosting package, there are 3 MX record types which will enable your emails in 3 different modes:
All emails will be allowed and displayed placed into the inbox of the email account.
The anti-spam will be turned on for incoming emails.
Anti-spam and Anti-virus
The anti-spam and anti-virus will be turned on for incoming emails.