> Source: [sk178125](https://support.checkpoint.com/results/sk/sk178125)

# sk178125 - Email reports to "smtp.office365.com" randomly fail 

| Property | Value |
|----------|-------|
| Solution ID | sk178125 |
| Date Created | 2022-03-10 |
| Last Modified | 2022-09-04 |
| Technical Level | General |
| Products | Other |
| Versions | Not Version-Specific |

## Symptoms

- * Email reports to "*smtp.office365.com*" randomly fail.

* *$RTDIR/log/smartview.log* shows this error message:

  ```
  
  javax.mail.AuthenticationFailedException: 421 4.7.66 TLS 1.0 and 1.1 are not supported. Please upgrade/update your client to support TLS 1.2. 
  Visit�https://aka.ms/smtp_auth_tls. [LO4P123CA0180.GBRP123.PROD.OUTLOOK.COM]
  ```

## Cause

On September 15, 2021, Microsoft started removing TLS1.0 and TLS1.1 support from Office365.

Exchange Online ended support for TLS1.0 and TLS1.1 in October 2020.

In 2022, we plan to disable those older TLS versions to secure our customers and meet compliance requirements.

We are aware that many customers may not have noticed the multiple Message Center posts and blog posts, and are not aware of clients or devices that are still using TLS1.0 to submit messages. With this in mind, starting in September 2021, we will reject a small percentage of connections that use TLS1.0 for SMTP AUTH.

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 75
* [Jumbo Hotfix Accumulator for R81](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81/Default.htm) starting from Take 72
* [Jumbo Hotfix Accumulator for R80.40](https://sc1.checkpoint.com/documents/Jumbo_HFA/R80.40/Default.htm) starting from Take 172
* [Jumbo Hotfix Accumulator for R80.30](https://sc1.checkpoint.com/documents/Jumbo_HFA/R80.30/Default.htm) starting from Take 254
* [Jumbo Hotfix Accumulator for R80.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R80.20/Default.htm) starting from Take 220

If you choose not to upgrade, Check Point can supply a **Hotfix** . [Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.  
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.  
For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

<br />

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content