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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 worklo...

dmccabej by Cisco Employee
  • 1146 Views
  • 2 replies
  • 0 Helpful votes

I am trying to setup DNS Lists to do a DNS Blocklist in Ironport. An issue I keep running into is some of the IP's that are on the DNS Blocklist keep coming up with "sbrs[none] SBRS None". It appears that it is one or the other with the SBRS and DNS ...

kbrown.it by Frequent Visitor
  • 7819 Views
  • 18 replies
  • 0 Helpful votes

Hi,   we have installed 2 x ESA C190 in cluster. all MX Record, A Record, PTR record is configured on public DNS. now both ESA are in production and sending and receiving emails.    we are facing one issue on ESA1 while sending email to one particula...

Hello, Just using the ESA Spoofing message filter at the moment, however it is catching anything that has the specified domain name in it... http://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/200166-Quarantine-Spoofed-Email-M...

Hello Is there any document existing concerning the ESA GDPR conformity ? Can't manage to find any... Would there be some link were we could find such documents for most Cisco products? Best regards, XLG

XLG by Frequent Visitor
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Good morning, We just built up a new vESA for our internal MTA to work with our Cloud ESA. Since building up the vESA, we have been receiving the following message:   The Warning message is: Unable to connect to the Cisco Aggregator Server. Details: ...

Please your solution, iam newly for ironport.we have Ironport C170 with version 10.0How make  block/drop domain with using reputation, so it automatically will be drop.And this is avoid ip spam blocking.current configuration, we use manualy bloking d...

rhidayat.sr by Frequent Visitor
  • 1825 Views
  • 6 replies
  • 0 Helpful votes

Good Morning, Our Cloud SMA was upgraded last night to ver 11.4.  Love the new interface!!  Just 1 question that I have.  From the console, when attempting to open up the Spam Quarantine, it opens in a new tab and I have the option to "try the new lo...

Cisco Registered Envelope Service Users:On November 3, 2018 beginning at 00:00 PDT (GMT-7), Cisco will be upgrading the Cisco Registered Service (CRES) from the current version of 5.3.4 to a version of 5.3.5.  Release notes for the new version can be...

Hi!In the document regarding replacing a ESA in a cluster it states that it needs to have the same asyncos build.We have two old ESA that we are going to replace with new ones. The old ones cant be upgraded to the async version that the new one comes...

jape0002_ by Level 1
  • 2197 Views
  • 3 replies
  • 1 Helpful votes