RE: IBM i Simple Mail Transfer Protocol (SMTP) support for OAuth 2.0

@Brad,

I think the below indicates the user has to do the setup on the provider
(Gmail or O365)!

Content
You are in: IBM i Technology Updates > IBM i Security > IBM i SMTP support
for OAuth 2.0

OAuth (Open Authorization)

Open-standard protocol that uses access tokens rather than username and
password
The access token grants scoped and time-limited permissions to access user
data on another service
IBM i SMTP OAuth 2.0

Implemented as Service Account with Domain-Wide Delegation
A single service account impersonates users within an organizational
domain, requiring administrative setup and domain-wide delegation
permissions
Supports Gmail (Google Workspace) and Office 365 (Microsoft 365) providers
Configuration through Change SMTP Attributes (CHGSMTPA) and Navigator for
i

<<<<<<<<<<<<<<<<<<<<<<<<<
Administrator performs out-of-band setup with the provider’s cloud
instance
Administrator creates an IFS file with provider‑specific OAuth 2.0
authentication information in JSON format
<<<<<<<<<<<<<<<<<<<<<<<<<

SMTP uses the JSON file to obtain information used to connect to provider
and obtain tokens
Send email is the same after initial configuration

 

Don Brown

Senior Consultant
 
[1]OneTeam IT Pty Ltd
P: 1300 088 400

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Rob
Berendt
Sent: Wednesday, 15 April 2026 9:17 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: IBM i Simple Mail Transfer Protocol (SMTP) support for OAuth 2.0

IBM i Simple Mail Transfer Protocol (SMTP) support for OAuth 2.0 OAuth
(Open Authorization) is an open-standard protocol that uses access tokens
rather than credentials like username and password. The access token
grants scoped and time-limited permissions to access user data on another
service.

Many providers currently or will require OAuth tokens instead of
passwords.

IBM i SMTP will support OAuth 2.0 by 19 June 2026 for IBM i 7.4 and later.

Implements as Service Account with domain-wide delegation Supports Gmail
(Google Workspace) and Office 365 (Microsoft 365) providers Configuration
through Change SMTP Attributes (CHGSMTPA) and Navigator for i Sending
email is the same after initial configuration

[2]https://www.ibm.com/docs/en/announcements/i-portfolio-enhancements
[3]https://www.ibm.com/support/pages/node/7267763
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