> Source: [sk168320](https://support.checkpoint.com/results/sk/sk168320)

# sk168320 - Mobile Access Blade Two Factor Authentication DynamicID  not forwarded to SMTP server

| Property | Value |
|----------|-------|
| Solution ID | sk168320 |
| Date Created | 2020-08-03 |
| Last Modified | 2020-08-10 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * Mobile Access Blade Two Factor Authentication DynamicID OTP via email is not being sent to end user, as configured.
* First authentication with username and password works fine, but not the 2nd factor.
* SmartLog error log: "DynamicID configuration error. Please contact your administrator."

## Cause

When proxy is configured on the Security Gateway, the connection to the SMTP server fails.

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## Solution

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

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