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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
  • 898 Views
  • 2 replies
  • 0 Helpful votes

Resolved! AsyncOS 15 version release date

Hello, As far as I dig up on the forum, I saw python 3 will be used with AsyncOS 15 version on ESA. There is a vulnerability on Nessus about this issue. But I cannot find any information about AsyncOS 15.0 release date. When will be AsyncOS released?...

zacakg by • Level 1
  • 1250 Views
  • 1 replies
  • 1 Helpful votes

Resolved! Best Practices attachment Filter

Hi all, as i couldnt find it via the attachment filter  / File Info. We got the information that a new way to infiltrate someone is to send .one (One Note) attachments. As they are not blocked by Macro i wonder if i can create a new Quarantine for th...

Resolved! User spam quarantine notification schedule

Hi guys, Sommeone could confirm me that shedule email notification of spam in user quarantine are sent only : - the first time a spam arrive. - if a new spam is arrive. But there is no email notification at the schedule time if there is no new spam. ...

mamotte by • Level 1
  • 703 Views
  • 1 replies
  • 0 Helpful votes

Rate Limit for Envelope

Hi,We have the "Rate Limit for Envelope Senders" alert set up on ESA for outgoing emails and all ESA admins receive them when triggered. I was wondering if there is a way generate an automatic email to the offender at the same time asking him to expl...

Special treatment for new sender incomming

Hi,I have more and more often a legitimate domains whichs is compromised.These domains have never been used to send email to my company before.Now attacker sends email from theses domains with a phishing link to me.Cisco security proxy did not detect...

sysresuem by • Level 1
  • 976 Views
  • 3 replies
  • 0 Helpful votes

Resolved! Secure Email Gateway Dictionaries API

I have a dictionary of email addresses that are blocked on an Incoming Content Filter.  I would like to create a Secure X workflow that can add or remove items from this dictionary.  Are there any API calls that can accomplish this?Cheers

TomML by • Level 1
  • 970 Views
  • 2 replies
  • 1 Helpful votes

Not Receiving Spam Quarantine Notification

Hello,We have set up the Spam Quarantine notification settings on our SMA per Cicso's user guides. We set it up so that just our team's AD Group should receive the notification (we're using LDAP). However none of us are getting anything. I was thinki...

myerss by • Level 1
  • 834 Views
  • 1 replies
  • 0 Helpful votes

Defang URL in a URL-List

Hello, I have several filters to defang the URL from a category or reputation score, but I wonder if it is possible to defang URL in a custom-list? Not sure I can do so with a Mesage filter as well. Any idea? thanks  

REJR77 by • Level 1
  • 901 Views
  • 1 replies
  • 0 Helpful votes

Cisco security proxy effiency

Hi,I have implemented Cisco security proxy rewritting for some of links present in incomming messages of my Cisco ESA.Some of these links are declared "safe" but there are clearly phishing email.Exemple of webpage in attachementThe user is directly o...

sysresuem by • Level 1
  • 385 Views
  • 0 replies
  • 0 Helpful votes
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