Unpatched or Unsupported Microsoft Exchange Servers Can Expect an SMTP 450 Error

Unpatched or Unsupported Microsoft Exchange Servers Can Expect an SMTP 450 Error
Gallery
Unpatched or Unsupported Microsoft Exchange Servers Can Expect an SMTP 450 Error

CyberSecurity, Microsoft

Unpatched or Unsupported Microsoft Exchange Servers Can Expect an SMTP 450 Error

On Monday, March 24th, 2023, Microsoft announced that it is enabling a transport-based enforcement system in Exchange Online serving three functions: reporting, throttling, and blocking.

Unpatched or Unsupported Microsoft Exchange Servers Can Expect an SMTP 450 Errormarc2023-04-04T09:32:32-04:00

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.

Necessary

Always Enabled

Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.

Cookie	Duration	Description
cookielawinfo-checkbox-analytics	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional	11 months	The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy	11 months	The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.

Functional

Performance

Analytics

Others

Unpatched or Unsupported Microsoft Exchange Servers Can Expect an SMTP 450 Error

Services

Partners

Company

The Corner View

Microsoft Releases September 2023 Security Updates – Patch Now!

Cisco Firepower 4100 Series, Firepower 9300 SA, and UCS 6300 Series Vulnerabilities

Citrix ADC and Citrix Gateway Security Bulletin for CVE-2023-3519, CVE-2023-3466, CVE-2023-3467

MOVEit Transfer Zero-day Vulnerabiity

Cisco Security Advisory for Multiple Products

Windows Server 2012 and 2012 R2 reaching end of support

Cornerstone.IT Awarded Citrix Platinum Partner Designation, Offering Clients Unmatched IT Solutions and Services

More Posts →