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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
  • 1511 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Choosing the outgoing interface

Hello all.I have a (two) C160 mail security appliance with the following network configuration .1 phisical interface2 IP interfaces, let's say 192.168.1.100 and 192.168.1.1012 Listeners. "Public" (192.168.1.100) and "private" (192.168.1.101).Mails fl...

Netnux by • Level 1
  • 1995 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Quarantine size increment

Hi,We ahave already increased the size of the Policy Quarntine to 15 GB which was shown as the Max limit.  We would like ti increase the policy quarantine to 30 GB. Is it possible to do this?Regrads,Tharun

tharunraj22 by • Community Member
  • 2476 Views
  • 5 replies
  • 0 Helpful votes

Resolved! automatic daily reports generated from the Iron Port appliance for the Disk and Memory Utilization as well Count of Messages Sent and Received.

Hi,We would like to get daily report on memory and the count of messages sent and received.  Can you please explain the configuration step for the same if possible?Regards,Tharun

tharunraj22 by • Community Member
  • 2279 Views
  • 1 replies
  • 0 Helpful votes

Ironport - Out of office messages

I have some trouble with the out of office messages. A succesfull first e-mail is send to a user and an Out of Office automatic message is send back by the Exchange Server.First it is send to the Ironport and the Ironport doesn´t send it to the user ...

Mail Flow Central

Hi!Mail Flow Central is no longer supported but it is necessary to archive mail logs from ironport c150 appliance.  Cisco released a new software product for this, or we must we must seek it from other vendors?thank you.Sergey.

Resolved! Virus Outbreak Summary

Hi,I am new to the Ironport world.  We receive a daily report (see image below) advising of local outbreaks.  Not being familiar with this I am concerned there might be an issue with our network.  Or is this spam/virus that have tried getting in that...

ssmalley77 by • Community Member
  • 2510 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Different types of Reporting

I understand that you can get reporting for domain-based reporting but I am unsure more on more of the differences on these type of reporting. can anyone please list all of the reporting options and the benifits...such as Domain-Based Executive Summa...

jonatlit by • Community Member
  • 6637 Views
  • 1 replies
  • 0 Helpful votes

Message Tag

We add a message tag to emails that are user selected to be sent secure using the Cisco Plug-in to exempt the email from DLP scanning.  Is that message tag removed when the message is sent or is it retained until manually removed?  Case - orginal mes...

Cisco IronPort ESA - C160

hi All,Cisco Ironport ESA Email Bundle with:AS, AV, Virus Outbreak Filters, encryption and DLP for 1 year (100 mailboxes)We are not familar with the Cisco IronPort Email, but has experience in deploying the WSA.Can somebody share the key concerns and...

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