SMTP AUTH is going away.
Microsoft Exchange Online is removing SMTP AUTH Basic Authentication. Legacy applications, and devices relying on username + password authentication will stop sending email soon.
What’s happening?
SMTP AUTH Basic Authentication in Exchange Online will be removed permanently in 2027. Systems that cannot support Modern Authentication (OAuth 2.0) must migrate to alternative solutions.
Microsoft SMTP AUTH Deprecation Timeline →Who is impacted?
Office Devices
Printers and scanners that send alerts or scanned documents via SMTP.
Applications
Legacy apps, admin tools or background jobs that still use basic SMTP AUTH.
IT Environments
On-premise and hybrid systems that rely on legacy protocols, including POP3 and IMAP.
What happens if basic SMTP AUTH stops working?
- Email delivery fails from legacy systems
- CRMs, printers, and other devices stop sending alerts
- Scripting jobs and automation lose email notifications
- IT teams face support tickets and escalations
A simple replacement for SMTP AUTH
Auth-Email acts as a modern SMTP bridge, allowing legacy systems and applications to continue sending mail securely without relying on deprecated basic authentication.
Find out more →What Auth-Email helps with
Legacy Devices
Keep sending email from printers, scanners, and devices that don’t support OAuth.
Secure SMTP
Replace basic authentication with a secure modern alternative.
Easy Migration
Transition away from basic SMTP AUTH quickly without rewriting applications, or disrupting workflows.
Compliance & Security
Support regulatory and security requirements without storing Microsoft credentials.
No Message Limits
Send reliably without throttles, caps, or deliverability penalties.