> Source: [sk120841](https://support.checkpoint.com/results/sk/sk120841)

# sk120841 - In rare cases, Security Gateway does not send "SMTP 554" response when Anti-Virus blade detects an e-mail with malicious attached file

| Property | Value |
|----------|-------|
| Solution ID | sk120841 |
| Date Created | 2017-10-10 |
| Last Modified | 2019-08-01 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- In rare cases, when Anti-Virus blade detects an e-mail with malicious attached file, Security Gateway does not sent "SMTP 554" response to the e-mail sender.

## Cause

MD5 of the detected malicious attached file is not retrieved from RAD cache in time.

## Solution

This solution requires authentication. Please log in to view the full solution.

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