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Changes to the on-campus SMTP service

If you are sending email through a server, copier, or UPS, or with an app or service using the on-campus SMTP service, you may need to update your settings on May 31, 2022, at 5:30 p.m. 

If you are sending emails using one of the SMTP IP addresses, you will need to update your settings when we replace these devices on May 31. OIT recommends utilizing the name but understands that some services and devices cannot. In that case, you should reconfigure your settings using the new numbers below. 

This change will not affect you if you send emails through (recommended) or with Office 365’s SMTP service.   

If you have any questions, please contact us online or read on for the technical details related to this announcement.  

The Office of Innovative Technologies is reconfiguring the service as part of the Windows 2012 retirement project. When an email is sent using, four IP addresses are behind that DNS round robin. OIT will replace the four current IP addresses with two new ones (see chart below).

If you have a device or application that is allowed to relay email thru and you have hard-coded an IP address instead of using the DNS name ( in the configuration, you will need to update the IP address being used or switch to the DNS name. We recommend using the DNS name,, instead of hard-coding an IP address.

The change will be implemented on Tuesday, May 31, 2022, starting at 5:30 p.m.

Existing IP Addresses New IP Addresses