> Source: [sk162312](https://support.checkpoint.com/results/sk/sk162312)

# sk162312 - Automatic reactions are not sent to the Mail server

| Property | Value |
|----------|-------|
| Solution ID | sk162312 |
| Date Created | 2019-09-08 |
| Last Modified | 2021-02-09 |
| Technical Level | General |
| Products | Security Management Server |
| Versions | R81 (EOS) |
| OS | Gaia |

## Symptoms

- * Email alerts are configured on the SmartEvent server, but emails do not arrive.

* The cpsemd.elg shows:   

  `
  [CPSEMD PID]@Host[DATE TIME] socket error`  
  `
  [CPSEMD PID]@Host[DATE TIME] SMTP server error code - 451`  
  `
  [CPSEMD PID]@Host[DATE TIME] SMTP server error message -`  
  `
  [CPSEMD PID]@Host[DATE TIME] CAutoReact::_DoOnAutoReactionFinishExecution: Status: fail (2), number of current jobs=(0)`  
  `
  [CPSEMD PID]@Host[DATE TIME] SMTP server error code - 451`  
  `
  [CPSEMD PID]@Host[DATE TIME] SMTP server error message - 5.7.3 Must issue a STARTTLS command first
  `

## Cause

Mail is being blocked by the 3rd party mail server that require TLS package as a first one.

## Solution

This is an expected behavior.   
Check Point does not support sending of the mails to mail server using TLS.

---

# 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