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Email, Unauthenticated SMTP for campus printers, web services, etc.

This page contains information about outbound-relays (aka Express-SMTP), an email service for on-campus IP addresses.

Who can use Outbound-Relays to send outgoing messages

Any computer, printer, web service or email client in the campus IP space, or on campus private IP space with NAT enabled can use Outbound-Relays to send outbound email messages. Note: If a network is opted out of NAT, it can no longer reach the outbound-relays address.


  • Private IP spaces on campus  (10.x.x.x, 192.168.x.x, & 172.16.00-  are no longer authorized to use  
  • The name is a deprecated name that exists for legacy systems.   

Configure your on-campus printer or other device to use Outbound-Relays

Set up your device with these connection parameters:
server settings




requires an encrypted connection:


reply email address:  A valid, deliverable email address OR ''. (Email sent to no-reply is discarded by the email relays.)

KeywordsExpress-SMTP, on-campus, campus IP address, email, printer, web services, outbound relays. smtp id   Doc ID47888
OwnerEmail Relays E.GroupUniversity of Illinois Technology Services
Created2015-03-02 16:59:14Updated2023-02-14 09:44:25
SitesUniversity of Illinois Technology Services
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