As part of our ongoing infrastructure and architecture improvements, we are revamping how we send messages, specifically contact center, e-list and notification messages. While these changes have been in the works for several months now, they will be evident within the system in the next 4-8 weeks.
Our primary goals are to increase the send speeds for these messages and to improve reporting and integration across the board. Fortunately, these improvements won't require any effort on your end; MC is handling all of the changes within the system as part of our normal release cycle. However, if you or your members have safe senders set based on IP address, there are some important updates to make.
What to Do
Previously, contact center and notifications were sent from 18.104.22.168. E-lists were sent from 22.214.171.124. After these changes are implemented on October 18th, all messages will be sent from either 126.96.36.199 or 188.8.131.52, regardless of the type of message. So, if your spam filtering is only set for one of these IP addresses, you will want to be sure to add the other one before October 18th.