This is a quick tutorial to setup Email Relay using Office 365 or Exchange Online services.

Requirements:

• Office 365 / Exchange Online Account
• Static IP address at your site (from where emails will be sent)

Setup

• Login to your Office 365 account using an account with admin right
• Navigate to Admin > Exchange > Mail Flow > Connectors
• Create a new connector, i.e:
• Connector Type: On-premises
• Connection Security: Opportunistic TLS
• Domain Restrictions: None
• Sender domains: *
• Sender IP addresses: <your static IP address>
• Save changes

SMTP server address will be the same as MX record for your Office 365 domain. It can be found in:
Admin > Office 365 > select your domain > Manage DNS 
No authentication is required (this is why you need to provide your IP address).

07.2014