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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.

 

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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 workloa...

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

Resolved! Safelist/Blocklist syntax

Hi, what is the correct syntax for recipient address in SL/BL? I tried to set Sender: testsender@testdomain.com Recipient: *@mydomain.com It's accepted but it doesn't work. When I tried Sender: testsender@testdomain.com Recipient: myname@mydomain.com...

flyok by • Level 1
  • 3647 Views
  • 6 replies
  • 0 Helpful votes

Reply to secure email caught in our SPF-Fail quarantine. Whats ALL the CRES servers so I can whitelist?

We just started having a problem with a vendor who replies to our Cisco CRES secure emails.  When they do this the emails come from a Cisco server, 184.94.241.96 mxnat1.res.cisco.com but the mail from indicates its from the actual company we are comm...

Config change log in Ironport

I want to know the configuration changes made by user(admin) on Ironport mail gateway. I do not want to depend on users comment in change but want to find out actual change log. which can give what was changed. Please let me know if they is any way t...

paladion.soc by • Community Member
  • 6891 Views
  • 2 replies
  • 0 Helpful votes

Cisco ESA Email block notification

I have several mails blocked due to senderbase reputation from legitimate sender, whitelisting will solve the issue but i need the sender to get notified if that possible. And if sender message blocked due to mail policy ,sender and recipient get not...

egsuptac911 by • Frequent Visitor
  • 2829 Views
  • 1 replies
  • 0 Helpful votes

Inquiry for Bounced mail

Hello,   I would like to inquire regarding the bounced mail, if there is a possibility to return the mail being sent by the sender back to the sender itself. If can do possibility, please kindly advise how to configure in ESA.   Thanks,  

Resolved! Cisco ESA 11.0.1-131 fixed issues?

Hello, Could someone tell me what  are the fixed issues in the Cisco ESA 11.0.1-131? There are no resolutions on the bug search site.   https://bst.cloudapps.cisco.com/bugsearch/search?kw=*&pf=prdNm&pfVal=282509130&rls=11.1.0-131&sb=fr   Thanks

Resolved! DNS List and SBRS None, One or the other

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
  • 8471 Views
  • 18 replies
  • 0 Helpful votes
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