SRFS (srfs.vanderbilt.edu) is the preferred ITS service for the relay of outbound SMTP from systems/devices.  Only qualified systems that have been registered with the SRFS service are allowed to relay through it. 

On the announced date, all legacy unauthenticated SMTP relay services will be shut down.  System administrators (including the owners of multifunction copier-scanners that send SMTP) are advised to switch to SRFS as soon as possible.

Register, Qualify, Configure – the sequence:

1. Get a static IP address for your system  [learn more]

2. Register  [register here]

3. Pass an initial security scan and accept recurring scans  [learn more]

• ITS ECS will coordinate an initial security scan of your system with either VUMC Network Security or Vanderbilt University's Network Security Group.   If the scan shows corrective action is needed, the security group performing the scan will contact you.
• All systems using SRFS are given monthly security scans on an ongoing basis.
• When your system has passed the security scan, ITS ECS will add the system to the ‘allow’ list for SRFS, and will notify you of this.

4. Configure your system (when notified):

• with an appropriate sending email address  [learn more]
• if it is a multipurpose printer/scanner/copier  [learn more]
• to point to srfs.vanderbilt.edu
  • Specify port 25 if your device requires such info.
  • SSL/TLS supported but not required.