New SMTP Relay Service Available

The Office of the CIO (OCIO) has developed an SMTP relay service as a part of the University E-mail Service that provides improved security, redundancy, and performance. The new service will replace the current relay service ( although both services will run concurrently until December 31, 2012 to allow the university community to make the necessary changes.

Why change?

The increased security of the new SMTP service is not only a best practice; it also increases e-mail system performance and stability by increasing SPAM control and minimizing unauthorized use of the service.

What changes for clients?

No changes are necessary for faculty and staff who are using the University E-mail Service and logging in via Outlook Web App (OWA) or a client directly into Exchange. Clients using the university’s current SMTP relay should switch to authenticated SMTP by (1) authenticating with a valid Ohio State Username (lastname.#) and password and (2) updating the outgoing mail server settings.

  • SMTP server =
  • Port = 587
    **The default port (25) must be updated to this value.**
  • Security type = TLS

The outgoing mail server information is also available in the IT Service Desk knowledge base at

 What changes for devices?

Devices, such as scanners, copiers, application servers, using the university’s current SMTP relay must be authorized with the OCIO to take advantage of the new SMTP service. The device must have a static IP address within the university’s range of IP addresses. For more information about moving devices to the authenticated SMTP service, see the IT Service Desk knowledge base at

When can we change?

Right now! Although the current SMTP relay will not be retired until December 31, 2012, switching as soon as possible will allow you to take advantage of the increased security and performance of the SMTP service and allow the current service to be retired sooner. OCIO team members will monitor activity over the current SMTP relay to minimize service disruptions during this changeover.   Additional updates and reminders will be provided through autumn semester until the changeover is complete and the current SMTP relay is decommissioned.

Thank you for your assistance. If you have any questions, please contact me at

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