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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
  • 1515 Views
  • 2 replies
  • 0 Helpful votes

CRES Feedback

Currently we have implemented IEA appliance in the Websafe mode.  However, Cisco has abandoned this product line and we are evaluatiing alternatives to this secure mail product.  Of course one option would be to convert to using CRES, we are looking ...

Resolved! How to create a CRES corporate account?

In the ESA Configuration guide, it lists a step as "If you want to use the hosted key service, create a Cisco Registered Envelope Service corporate account. You create the account by clicking the Provision button after configuring an encryption profi...

tmorgan11 by • Community Member
  • 4169 Views
  • 4 replies
  • 0 Helpful votes

Please use the logconfig->hostkeyconfig command to verify (and possibly update) the SSH host key for

let me start off by saying the Search feature on this forum [ahem] community is horendousAnyway we replaced our C350 appliance with the newer C370 and now our M650 appliance complains that:The host key for 111.122.133.144 (IP Address obfuscated) appe...

S160 need to allow facebook.com

Hi,I need to alow facebook.com which comes under social website which is  blocked .I just want to allow facebook.com .i created customer web filter and its seeems i can go to facebook.com but when i press login button the  page show incomplete like i...

Help with CLI filters

Good Afternoon,We are attempting to allow in a particular email by looking at a "X-Header".  The vendor has given us the "X-Header" and I'm attempting to use it in a filter.  Here is the filter that I have set up:allow_webfilings: if (recv-listener =...

C160 anti-spam service paused?

  I received an alert from our C160 and logged in to find this message in the Status:System Status: Paused on services: antispam    I checked the Service under Security Services > Ironport Anti-spam and it's checked as enabled. What would cause this ...

ashaw216 by • Level 3
  • 1690 Views
  • 1 replies
  • 0 Helpful votes

Ironport receiving alot of emails

Ironport is receiving alot of emails to alot of users in organization in a short period of time from a specific sender ,the sender group matches suspect in all ways but some emails are quarantined and some emails are passing as showed  in the message...

sarahddin by • Community Member
  • 1645 Views
  • 4 replies
  • 0 Helpful votes

Resolved! Query on encryption

Hi,We are using the encrption on Ironport with CRES.  The recepient cannot open the mail until he registers to the service onliine.  So my wuery is that where is this mails being stored? Will the encrypted mails deliver to the recepients mail server ...

tharunraj22 by • Community Member
  • 2731 Views
  • 4 replies
  • 0 Helpful votes

New SBRS issue?

Has anyone else heard of a new issue with SBRS lookups?Cisco support is telling me that there is a "software defect/bug" in version 7.6.0 and 7.6.1 that affects SBRS lookups but it only started in the last 24 hours after they pushed out some sort of ...

Bob Fayne by • Level 4
  • 5470 Views
  • 9 replies
  • 0 Helpful votes
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