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LevelBlue Knowledge Base

Home » Knowledgebase » MailMarshal (SEG) » HOWTO: Configuring SSL Options for "unsafe legacy...

HOWTO: Configuring SSL Options for "unsafe legacy renegotiation"

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This article applies to:

  • MailMarshal 10.1 and above
  • Advanced SSL options for Sender TLS
  • Allowing "Unsafe Legacy Renegotiation" for TLS

Question:

  • How do I allow "unsafe legacy renegotiation" for Sender TLS?
  • Need to negotiate TLS with legacy servers 

Background:

Some older email servers still use TLS renegotiation methods that have been deprecated for many years. Current MailMarshal versions (10.0.7 and above) disallow these methods by default.

Procedure:

To allow "unsafe legacy renegotiation":

  1. In the MailMarshal 10.1 Management Console, navigate to Configuration > Advanced Settings.
  2. Add the following setting as required:
    • Sender.SSLContextOptions (Integer)
      • Value: 262148
  3. Apply configuration, and then restart the MailMarshal Sender service on each processing server.

Upgrade from 10.0.7 to later versions

Some customers applied a Sender hotfix to release 10.0.7 for "unsafe legacy renegotiation". These customers must still apply the Advanced Setting to maintain the behavior in any later version.
  • To ensure continuity, customers can create the Advanced Setting in 10.0.7 before upgrading. It is not necessary to restart the Sender. The Advanced Setting will take effect immediately on upgrade.

Notes:

The setting takes a generic integer value to allow for any future requirements. However, only values specifically provided by LevelBlue are supported. 

To contact LevelBlue about this article or to request support:

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