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Important Announcements

Cisco Secure Email Add-Ins No Longer Supported on Microsoft Outlook 2019

This is to inform you that, effective October 14, 2025, Microsoft Outlook 2019 is no longer supported for the Secure Email Encryption Service Add-In and Secure Email Submission Add-In.

To continue using these Add-Ins, we recommend upgrading to Microsoft 365. Starting October 2025, download and install the new manifest for:

- Secure Email Encryption Service Add-In from the CRES Admin Dashboard

- Secure Email Submission Add-In from the Cisco Software Download Portal

After downloading the manifests, follow the instructions provided in the Submission and Encryption Add-In guides. For more information, see: Cisco Email Encryption - End-User Guides.

TLS 1.0/1.1 Deprecation from AsyncOS for Secure Email Gateway, Starting version 16.5

We would like to inform you that starting with the AsyncOS 16.5 release, TLS versions 1.0 and 1.1 will no longer be available as configuration options in both the CLI and GUI.

To ensure secure email delivery and receipt, you should use TLS versions 1.2 and 1.3. These versions can be configured via the sslconfig CLI command or through the System Administration > SSL Configuration menu in the user interface.

For detailed instructions on updating TLS versions, please refer to the “System Administration” section of the User Guide for AsyncOS 16.0.x for Cisco Secure Email Gateway.

 

Forum Posts

  Important: Migrate from Secure Email Virtual C100V Models to Avoid McAfee-Related Issues Dear Valued Customer, We are reaching out to ensure your Cisco Secure Email environment continues to operate at optimal performance and reliability. As worklo...

dmccabej by Cisco Employee
  • 1598 Views
  • 2 replies
  • 0 Helpful votes

I am setting up an Ironport C360.I have configured content filters and mail policies to block certain file types.When a small file of 2mb is sent in, the email and attachment are quarantined as expected.When a larger attachment of 4mb is sent in, it ...

When using the grep command for the mail_logs file I sometimes receive the message "Binary file (standard input) matches."This does not always happen. Sometimes I'm able to use grep and receive the expected results. The problem seems to come and go.D...

I know we have Message ID (MID), Incoming ID (ICID) and Outgoing ID (DCID). But in the following message, what does RID represent?Info: Delivery start DCID 536 MID 21779 to RID [0]

nic-dteam by Community Member
  • 1157 Views
  • 1 replies
  • 0 Helpful votes

Hello,I have a quick question concerning Text Resource.For example, after creating a notification we can edit and modify its content. However is there a way to modify the name of the notification ?Or only solution is to copy and create a new notifica...

IT_Ironport by Community Member
  • 1115 Views
  • 1 replies
  • 0 Helpful votes

Hi.We have 2 C350, and would like to setup TLS. I have found the document "Encrypting SMTP Conversations Using TLS".My question is, should i use 2 certificates og just 1.Best regardsThorsten