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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

Resolved! TLS Order

Good Morning, We had an issue yesterday with a company that we have setup "Required TLS" with. For the past few weeks, we were not able to send TLS emails to this company. In order to troubleshoot the problem, we disabled Required TLS, changed to Pre...

Hello, I am looking for a solution to send all messages that are marked as clean or all messages delivered to a secound destination.  I already tested the content filters BCC Rule, but this dublicates the message befor the Anti-Spam. So if messages g...

y_haas by Community Member
  • 1103 Views
  • 1 replies
  • 0 Helpful votes

Does anyone have any suggestions for backing up a VMware hosted SMA?  I see there is a way to backup to a secondary SMA, but we don't currently have a secondary SMA.  I am guessing my license doesn't allow for hosting an offline one either.   I have ...

juselding by Visitor
  • 5034 Views
  • 4 replies
  • 0 Helpful votes

Hi there,   I currently have a successful message filter which scans the attachment, determines if a hyperlink is present that links to an .exe extension, notifies and quarantines.   My issue is that if i name the hyperlink in the attachment it is no...

PX by Frequent Visitor
  • 2017 Views
  • 2 replies
  • 0 Helpful votes

Hi, we configured our system to quarantine a message if the AMP service is not available or it the message is unscannable.   But the Problem is, that the recipients does not get a notification about a quaranteined message.   How do i configure a Noti...

Default0815 by Frequent Visitor
  • 3416 Views
  • 3 replies
  • 0 Helpful votes

Hi,   we have two companies with independend IT but sharing the maildomain.   company1 = only sends dkim signed mails for domain.de (no ESA) company 2 = sends (dkim signed) mails and receives mails for domain.de (ESA C170 cluster)   All incoming and ...

franz2018 by Frequent Visitor
  • 4421 Views
  • 10 replies
  • 0 Helpful votes

I am renaming and re-ip my DR ESA and SMA. Where is the secondary config section in the XML for ESA and SMA?   I'm trying to figure out what I need to do after change the DR ESA's name and IP address.  Whether SMA is pulling the data by IP or Name an...

jtsai8585 by Level 2
  • 2399 Views
  • 5 replies
  • 0 Helpful votes

I'm looking at setting up inbound and outbound TLS for my cluster of two C-class machines. There are some very good TAC articles and a number of threads on the subject of TLS, but I've run into an apparent problem over the correct choice of certifica...

exMSW4319 by Level 7
  • 4320 Views
  • 8 replies
  • 0 Helpful votes

Resolved! New spam trend?

Users reported receiving more spam messages than usual. From these spam messages processing details we noticed that the emails size is big enough to exceed the Anti-Spam scanning engines hence skipping them and delivering to the recipients. The email...

DataBland by Level 2
  • 3263 Views
  • 2 replies
  • 0 Helpful votes

The email are not being delivered by Iront Port to Exchange server and we are getting below error on IronPort.  I can send the emails but issue is only related to inbound emails.    (DCID 601597) Delivery started for message 1123223 to test@domain.co...

asifjanjua88 by Community Member
  • 5423 Views
  • 1 replies
  • 0 Helpful votes
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