An MX (Mail eXchanger) record tells senders how to send email for your domain.

When a domain is registered, it’s assigned several DNS entries, which enables it to be located on the Internet.  These include MX records, which direct the domain’s e-mail flow.  With Protected Trust each record points to a server that’s configured to process mail for the domain.  There’s typically one record that points to a primary server, then additional records that point to one or more backup servers.  For users to send and receive email, their domain’s MX records must point to a server that can process their mail.  In order to receive email, your domains DNS MX (Mail eXchanger) records must be pointed to Protected Trust.

MX records can be updated by contacting your hosting or DNS provider and have your domain(s) MX (mail eXchange) record changed to:

For Exchange 2007 Clients:
Priority 10:    inbound10.elephantoutlook.com.
Priority 20:    inbound20.elephantoutlook.com.
Priority 30:    inbound30.elephantoutlook.com.

For Exchange 2010 Clients:
Priority 10:    inbound10.us.elephantoutlook.com.
Priority 20:    inbound20.us.elephantoutlook.com.
Priority 30:    inbound30.us.elephantoutlook.com.

MX record changes usually propagate across the Internet quickly (between 1 and 24 hours) and whole domain transfers take longer (24-48 hours).

Note: The priority, this allows the ranking of each mail server since there will be more than one for redundancy.