Scheduled Service Change: Change appsmtp IP address
None, DNS change
There is no workaround for this issue
The IP address for appsmtp.mail.cornell.edu is changing to 18.104.22.168. This is to correct a problem where appsmtp couldn't talk directly to Exchange. The current IP will remain in use for a couple weeks to make sure everything switches over. We will ensure everything has switched over before decommissioning the old one.