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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 workloa...

dmccabej by Cisco Employee
  • 1657 Views
  • 2 replies
  • 0 Helpful votes

We are currently managing our ESA (Email Security Appliance) without utilizing SMA (Secure Management Appliance) and have a requirement to schedule a DLP (Data Loss Prevention) report. Specifically, we need detailed information such as Sender ID, Rec...

sv7 by Level 5
  • 742 Views
  • 1 replies
  • 0 Helpful votes

Hello everyone, i'm working on a case and maybe someone is able to give me suggestions.  There is a Mail coming from Exchange Online via Connector to Exchange OnPrem and from there sent to ESA. The Message has a 550 Failure with status fail/bodyhash_...

I just updated to 15.0.0 build 104 and I am getting the error:ISQ: db.init() failed. Retry after short pause.and the quarantine services are not starting. Might be related but I am also getting :The operating system partition is at 93% capacity Unsur...

kpetrozzi by Community Member
  • 2537 Views
  • 4 replies
  • 0 Helpful votes

Hi,I'm looking for a way to add the domain to the external tag of an incoming external mail, but I'm having a hard time figuring out how to do this. Has anyone tried this already and have an idea how this can be done via message filters (preferred) o...

Andrei V by Frequent Visitor
  • 484 Views
  • 1 replies
  • 0 Helpful votes

Hi guys,Can you help me with this problem with inbound mails. From certain domains i get this response on ESA(TLS failed. Reason: Unknown Error).  After that the receiving is aborded. What may be the cause of this. Current version of my OS is 14.2.1....

Andrei88 by Community Member
  • 4073 Views
  • 5 replies
  • 0 Helpful votes

We receive emails in which the DMARC Aggregate Report is not attached.===========================================From: MAILER-DAEMON@esa1.***.iphmx.comSender: MAILER-DAEMON@esa1.***.iphmx.comTo: dmarc_agg@vali.email, ***@ar.glockapps.com,***@dmarc.ki...

digdiver by Community Member
  • 911 Views
  • 0 replies
  • 0 Helpful votes

Hi.When attempting to save config on C100V 15.0.0-104 i'm getting error below. If trying to issue support request same thing happens, so i'm quite stuck here. More, Cisco Case system refuses to take any kind of serial number (I've tried VLN/PAK/Seria...

n0p by Community Member
  • 774 Views
  • 2 replies
  • 0 Helpful votes

Hola buenas tardes quisiera hacer una consulta sobre el cisco CES Cloud, actualmente tenemos esta solucion en la nube para nuestros correos y quisiera saber si se puede monitorear atravez de SNMP como el estado de CPU, memoria, disco, colas de mensaj...

In AsyncOS 15 several more secure eliptical curves have been removed.In AsyncOS 14 the following are supported:secp192r1secp256r1secp384r1secp521r1In AsyncOs 15:secp256r1I need at least secp384r1 to connect to our openldap server.

fred7 by Frequent Visitor
  • 434 Views
  • 0 replies
  • 0 Helpful votes
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