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|
|188.8.131.52/25||184.108.40.206 through 220.127.116.11|
|18.104.22.168/25||22.214.171.124 through 126.96.36.199|
|188.8.131.52/25||184.108.40.206 through 220.127.116.11|
|18.104.22.168/25||22.214.171.124 through 126.96.36.199|
|188.8.131.52/24||184.108.40.206 through 220.127.116.11|
|18.104.22.168/24||22.214.171.124 through 126.96.36.199|
|188.8.131.52/24||184.108.40.206 through 220.127.116.11|
All mail will have the sending domain format m##.em.secureserver.net.