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...
Email Security
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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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Forum Posts
Hello all,currently I got a problem with a domain.I has adding a domain ex. yahoo.co.id in Whitelist Host Access Table. But, when I did message tracking. There are some email are in UNKNOWN or SUSPECTLIST. Many thanks for you help.
Resolved! ESA Development
Is the ESA still being actively developed for? Since the final cutover to Cisco, they have sent EOL notices for a couple of AsyncOS versions but nothing new has come out. The last version is from more than 1 year ago and the Outlook plugin is more th...
We have existing C150 in a cluster. We have a new standalone C170. I believe I should just be able to export the config off of the C150 and import it into the C170 as they are the same product family and then just clean up the C170 config becuase it ...
Hi Guys,How can i add the x-esp header to the emails under Ironport?i need this to know the score of each email i'm receiving. (which is configured generally under spam thresholds/under incmoning mail policies/ Anti-spam settings) as follows: -------...
Hello,I want to avoid creating a regular expression containing all the extensions we want to block and use the fingerprint filter instead (who seems to add a bit of intelligence).However the fingerprint "file-type" function is not very well documente...
Hello,I have a question on Email Seucirty Appliances ordering. Let say I want an ESA C370 with inbound checking with Anispam, Antivirus and Outbreak Filters. But for Antivirus I need McAfee, not Sophos. So what I should order? The appliance itself th...
Obviously, this means that a TLS connection with certificate is required, and that the certificate should not have expired.However, does it also check the certificate name? If so, against what?I've a problem because a 'Required,verify' is failing to...
Can some one please help me on the above error ,& let me know how can i resolve this issue?
Hi guys,I'm using a Management ironport appliance as external quarantine for two Ironport email security devices (clustering), i have enabled Users Safe/Blocks and simply it is not working.When the user add email address as white/block to his own lis...
You can generate a certificate in PEM ironports and the same use in other Ironports
Hello,Is it possible to configure the Ironport to only contain 90days of data in the tracking logs? Every logfile that is older than 90 days gets deleted.Looking forward to your replies.Best regards,Philip
We have a C160 running 7.6.0. There is a hung session listed when the WHO command is issued from 156 days ago. How can I flush this? I don't see a KILL command or anything similar. Thanks.
One quick Question:Talking about a C-170, What happens when the McAfee feature key is expired? Does it stop scanning all mail or does it stop updating it but still scaning?Thanks a lot in advance.
Resolved! Test CLI Filters
Hello Community,I can't find the answer in existing topics, so i start a new discussion:Creating filters on Ironport by CLI.How is it possible to test the new filter? (without activating it into the production workflow)(there is no "test" appliance, ...
Hi,Is there anywhere near on the roadmap implementation of 7zip file support on ESA?Many thanks,Milan
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