> Source: [sk108071](https://support.checkpoint.com/results/sk/sk108071)

# sk108071 - No spam is detected although Anti-Spam is enabled on Security Gateway

| Property | Value |
|----------|-------|
| Solution ID | sk108071 |
| Date Created | 2015-10-07 |
| Last Modified | 2017-10-24 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * No spam is detected although Anti-Spam is enabled on Security Gateway.  

  Kernel debug ("`fw ctl debug -m fw + mail content`") does not show any spam being detected.  

* Issue occurs regardless of configuration of how SMTP traffic should be scanned - "`By Mail Direction`" or "`By IPs`" (SmartDashboard - "Anti-Spam \& Mail" tab - in the left pan, open "Anti-Spam" - open "Advanced" - click on "SMTP")  

  Issue occurs even when following [sk42727 - How to test if Anti-Spam works properly](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk42727)

## Cause

Manual NAT is configured on Source and Destination in the same rule, which causes direction matching problem. These SMTP connections are treated as outgoing and not as incoming. As a result, the original IP addresses are not matched to the NATed IP addresses.

## Solution

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

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