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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
  • 880 Views
  • 2 replies
  • 0 Helpful votes

Virtual ESA LGAP GUI problem

Hi I am running virtualized ESA and after I configured the LDAP and committed the changes, I was no longer able to access the LDAP GUI. I got the following error: Application Error An application error has occurred and has been logged to the GUI log....

pauls7490 by • Level 1
  • 1103 Views
  • 2 replies
  • 0 Helpful votes

Ironport - Email Undeliverable

I have 1 Ironport and 2 lines for outgoing/incoming to internet.  Both lines using different ISP Ironport host configured mail.domain.com mx record - 10 Pref - mail.domain.com - 100.100.100.100 mx record - 20 Pref - mail2.domain.com - 101.101.101.10...

Extract certificate from ESA

Hello everyone, our partners asked us the certificate in PEM or CER format. They would like to extract the public key of our ESA (using the java tool "keytool"). In: Network-> Certifcates-> Export Certificate I inserted a password and export. But the...

Spoofed Email Oddity with reply-to:

Ran into this on a customers Ironport running v8.5.6-106 (I need to upgrade them). I was building a content filter to check if the From: header matched the company domain and if the mail-from: was a different domain and ran into an issue with anothe...

Resolved! Alert LDAP

Hi Team. We have received some alerts like this: "The query x.accept failed with result inquiry timed out".  Please let me know if we can make any correction in ESA or this timed out is caused by the client network or server. Best Regards

Resolved! Ironport Tuning

Does anyone know of a way to tune the Ironports so that the content and language filter does not quarantine legitimate emails because a word may contain part of a word that is to be filter.  IE, the word  "classified" causes emails to be quarantined ...

IronPort Custom NDR for SBRS Scores

We have just had an issue where a customer was trying to send us an email but was getting blocked with a low SBRS score (-1.1). Unfortunately it was going on for a few days and no one was the wiser and this was causing some business impact.   I would...

Resolved! Ironport Critical alert

Hi I'm getting a lot of these errors from the ironport, but i never see a problem when logging in. Anyone knows what it means ? The Critical message is:   An application fault occurred: ('util/MapBase.py _whois|99', "<type 'exceptions.ValueError'>"...

Ironport Application Fault

Hi ! We are constantly receiving this critical message; The Critical message is:   An application fault occurred: ('screen/AppController.py customActionCheckFailed|849', "<type 'exceptions.TypeError'>", 'actionRestrictedCheckFailed() takes exactly ...

Daily Digests and Report

All, We are using a Cisco ESA C370 to provide managed email filtering for our clients.  At the present time, only 1 client is being hosted.  I'm new to the ESA and am trying to find a way to perform the following: Instead of sending a daily digest p...

jbilder93 by • Level 1
  • 909 Views
  • 1 replies
  • 0 Helpful votes

Resolved! adding text in subject

Hi all.  To counteract spear phishing attempts, i'd like to add a text string to the beginning of every subject received from the outside.  Seems like a perfect job for an inbound content filter.  The condition is simple: Remote IP\Hostname Is Not my...

KTD1 by • Level 1
  • 5500 Views
  • 4 replies
  • 0 Helpful votes
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