On January 30, 2018, sending email to the Internet-at-large needs to use authenticated-SMTP and go through message hygiene (anti-spam and anti-virus scanning). Office 365 Exchange Online (O365) is the preferred solution as it provides both.

For University of Iowa systems which cannot use O365, the system known as ns-mx.uiowa.edu will continue to be available with two changes: (1) it will no longer provide message hygiene, and (2) it will only accept messages directed to University of Iowa O365 domain names,(e.g., uiowa.edu, iowa.uiowa.edu, hawkeyesports.com, healthcare.uiowa.edu.)  It is recommended that you have a valid mailbox to send from when using ns-mx.uiowa.edu.

If you are using smtp.office365.com or email.uiowa.edu, you will be required to:

  1. have a mailbox in the University of Iowa O365 tenant (e.g., uiowa.edu, iowa.uiowa.edu, hawkeyesports.com) NOTE: Healthcare users will need to use Healthcare's SMTP relay service - contact the HCIS Help Desk for more information 
  2. use the mailbox email alias or other SMTP address stamped on the mailbox as the From address in your message
  3. authenticate using the mailbox account ID/Service ID and password.  If the password is not known then the account owner can call the ITS Help Desk at (319) 384-4357 to have it reset.

If you need a mailbox created, see https://its.uiowa.edu/content/faculty-staff-shared-departmental-account-request.

Email submission choices

The following chart summarizes the available choices for submitting email from campus.

  smtp.office365.com email.uiowa.edu ns-mx.uiowa.edu
sending server IP campus GSA campus LSA or data center campus GSA or LSA
authenticated SMTP required required not available
recipient email address any any O365 domain only
Require Encryption Yes (SSL or TLS) Yes (SSL or TLS) No


smtp.office365.com on port 587

This service is provided by Microsoft Office 365 Exchange Online (O365). To connect to it, a sending system needs to be on a “global-scoped address” (GSA) and have access through host and data center firewalls. Authentication is required using a valid Hawk ID or service account. The From address specified when sending must be authorized for the associated Hawk ID or service account.  i.e. the mailbox email alias or other SMTP address stamped on the mailbox. 
Note: Some user accounts may have owner/send as rights for the service account and thus be authorized, but we do not recommend and strongly discourage programming personal HawkID and password information in applications.

email.uiowa.edu on port 587

This service is an on-campus gateway to smtp.office365.com. It is provided to allow “local-scoped address” (LSA) systems (or firewalled systems in the ITF and LC data centers) to send via O365. It has the same requirements as smtp.office365.com.

ns-mx.uiowa.edu on port 25

This service is available for sending without authenticated-SMTP. It is available for use by systems on GSA or LSA. The To address specified must be in the list of valid University of Iowa O365 domain names.

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Last updated: 
January 30, 2018