While you shouldn't normally have to worry about emails getting through with Email Marketing, some domains only allow email from manually whitelisted senders. So, these recipients may need to whitelist emails from Email Marketing, for improved delivery.
Depending on their requirements, you may need to give your recipients:
These are all the IP addresses that your email may be sent through:
|IP range||Included IPs|
|184.108.40.206/25||220.127.116.11 through 18.104.22.168|
|22.214.171.124/25||126.96.36.199 through 188.8.131.52|
|184.108.40.206/25||220.127.116.11 through 18.104.22.168|
|22.214.171.124/25||126.96.36.199 through 188.8.131.52|
|184.108.40.206/24||220.127.116.11 through 18.104.22.168|
|22.214.171.124/24||126.96.36.199 through 188.8.131.52|
|184.108.40.206/24||220.127.116.11 through 18.104.22.168|
All mail will have the sending domain format m##.em.secureserver.net.