> Source: [sk111560](https://support.checkpoint.com/results/sk/sk111560)

# sk111560 - Anti-Bot blade drops legitimate e-mails with "Still unable to connect to Datacenter" log in SmartView Tracker

| Property | Value |
|----------|-------|
| Solution ID | sk111560 |
| Date Created | 2016-05-18 |
| Last Modified | 2016-05-18 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * Anti-Bot blade drops legitimate e-mails with the following log in SmartView Tracker:

  * Malware Details

    ```
    
    Protection Name = Mail analysis
    Malware Activity = Spam
    Protection Type = Suspicious Mail
    ```

  * Traffic

    ```
    
    Source = <Host (IP Address)>
    Destination = <Domain (IP Address)>
    Protocol = tcp
    Port = smtp (25)
    ```

  * More

    ```
    
    File Direction = Internal to External
    Reason = Still unable to connect to Datacenter
    Control = Anti Malware
    Description = Spam email
    ```

* Kernel debug ('`fw ctl debug -m fw + drop`') on Security Gateway shows that SMTP connection (TCP port 25) is dropped:  

  `;fw_log_drop_ex: Packet proto=6 X.X.X.X:N -> Y.Y.Y.Y:25 dropped by fwpslglue_chain Reason: PSL Drop: internal - SI packet;`

* */var/log/messages* file on Security Gateway shows the following from Anti-Spam daemon:  

  `ctasd[<PID>]: CMsg::ScanMessage() - Still unable to connect to Datacenter`

* Security Gateway is configured as a Mail Transfer Agent (MTA) and sends a non-delivery report for the rejected e-mails.

## Cause

Security Gateway is not configured correctly.

If a proxy server is configured for Anti-Spam blade, but is not present in the environment, then Anti-Spam blade will not be able to determine if some e-mails are spam. When this happens, the default decision is to mark those e-mails as spam. As a result, e-mails are blocked.

## Solution

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---

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