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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.

 

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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
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Resolved! Exception Table

Hi, I added sender verification exception (email address) to exception table (behaviour - "allow") and turned it on in mail flow policy, but when this sender sends me letter, his letter falls in quarantine. What's the problem, i did something wrong? ...

Unable to access IronPort C150

I recently went and applied updates. The last update brought the system up to AsyncOS 7.6.3 Build 019. After the update was applied, the system needed to reboot. It did that part without issue. I bring up the web interface and log in. After entering ...

Reputation Filtering

our appliance used to be able to stop over 80% spam by reputation alone, it has now gone down to around 60% over the year. not sure if it was caused by one of the updates or the spammers have just gotten better at bypassing spam sensors......anyone e...

X-Headers not caught by filters

Good morning everyone,I came across a strange issue with usage of X-Headers in content filters and I was unable to find answer to it elsewhere.All e-mails coming now to my IronPort have an extra X-Header, namely X-Originating-IP. I created a content ...

Local IronPort Update Server

Is it possible to configure a local server to function as the IronPort update server and serve as a repository for the spam and antivirus signatures? Instead of allowing each IronPort device to access the internet we'd like to be able to control the ...

Delayed messages with New ISP

I have an odd problem that so far Cisco has not been able to resolve.  We are in the process of migrating from AT&T fiber to Comcast Business Fiber.  All DNS records have been moved over. We currently have both links up. The ASA configuration is setu...

Block and Unblock the .zip and .rar files based on doamin or user account base on incoming mails with ironport email security.

Hi All,Request you all to help me out in blocking/dropping only the attachments with the extension .rar and .zip in incoming mails for particular users or domains.as of now I have did for all the domains or users.However, I want to unblock it only fo...

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