Exchange 2013 Settings:

SMTP Server IP address / Host Name:

(We do not provide a specific IP address as the item need to come to any of a range of available servers on our cloud network. This eliminates the probability that mail is being sent to a server that is currently down for maintenance.)

Port: 25

Username: Full E-mail Address
Password: E-mail Address Password
Authentication Type: Basic (No SSL or TLS)