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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

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Migrate from Secure Email Virtual C100V to Avoid McAfee-Related Issues

  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
  • 1502 Views
  • 2 replies
  • 0 Helpful votes

Resolved! ESA loging partition

Hello!   Could someone tell me which partition contains the log files?I'd like to extend the disk quota but I don't know which.   Spam Quarantine (EUQ)Policy, Virus & Outbreak QuarantinesReportingTracking Miscellaneous Files   Thanks!Regards,Zoltan

TLS verification

How to verify and disable TLS 1.0 /1.1 and allowing only TLS 1.2  on CIMC C220 Standalone rack servers. We are upgrading to 3.0.4(a)  which release notes mentioned supporting TLS1.2,  We wanted to validate from blade which version is enabled and not ...

hk1213 by • Community Member
  • 1458 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Block some attachments

Hi, I want to reject emails with some attachments (EXE, COM, DLL, scripts, etc.) but just only quarantine emails with this files in compressed packages (ZIP, RAR etc.) How can I do that. I've made an "incoming Content Filter", but there is only e few...

flyok by • Level 1
  • 2472 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Email Connection Lost

Hi Community,   Below is the attached Message tracking details.   In message tracking it is showing Incoming connection has lost and the next line it is going for the next email pipeline scanning engine and at the end it started DCID connection to th...

Ali by • Level 2
  • 9896 Views
  • 3 replies
  • 0 Helpful votes

BlockSpoofing

Hello We have cisco email security C190 appliance we want to block or reject any mail coming from internet which as our SMTP domain in sender email ID, suppose we have our SMTP domain is "mydomain.com" so any incoming mails from internet which has se...

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