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
Hi all,Quick question in regards to a IconPort C150 Appliance with AsyncOS 7.5When partner send on behalf of our company and we have added their email servers to our SPF record in DNS. do we need to do something on IronPort too?To my knowledge we are...
I have created 9 policies to implement for Ironport - DLP Policy Manager and created content filter conditions with action. I need to implement then within outgoing mail policies. I have created a policy sync of content filters & DLP policies withi...
Hi,The filter below works very well but when I add OR (sendergroup != "ALLOWSPOOF") part it does not. It begins to quarantine messages.WORKS-Spoofed_Email_Filter: if (recv-listener == "IncomingMail") AND ((header-dictionary-match("spoof-domains","Fro...
Hiiiiii alllll,My name is pramod.I am using cisco ironport email virtual appliances (C000V). I had impliment it on my esx server with 45 day's trial version of license.I am using first time this appliancess. Can you please help me about,1) How to do...
Resolved! Upgrade Virtual ESA
Hi,Does anyone know how to upgrade a Virtual Email Security Appliance from version 8 to 8.5? Is it possible, or do I have to redeploy the VM?Cheers,Gavin
Hi,I'm reviewing an ironport architecture, and especially an incoming relay (ESA C370, AsyncOS 8.0.1). I have two domains, hosting by two different mail servers. The relay only accept mails from Internet and can only send to the two mail servers.The ...
Resolved! Impossible to join Cluster
Hi,I try to create a cluster with two ESA C370 with AsyncOS 8.0.1 (we will call its ESA1 and ESA2).If I create the cluster on ESA1, and make ESA2 joining (over SSH or CCS), no problem.But if ESA1 leave the cluster and want to come back, I have the fo...
Hello,We have quite a few users who can release emails. We need to find out who released an encrypted email. When we track the encrypted message through message tracking it shows it was manually released but no credentials are provided. I checked the...
Hi friends, We are using cisco ironport c170. Today we cannot send email for particular email id(domain). the error msg as below,Diagnostic information for administrators:Generating server: sgm.svc.com.sgabc@anson.com.sg[182.**.**.51] #<[182.**.**.5...
Reading through the announcement located here:https://supportforums.cisco.com/community/netpro/security/emailIn my config I have a 204.15.81.x subnet configured for required TLS from a few years ago. Is 204.15.81.0/26 no longer used for CRES?
I want to configure one policy for incoming mail i.e. any attachment in incoming are of following type then it should directly drop the mail.e.g. msc, msi, wsf, add, mde. How do i configure policy above requirement, kindly someone tell me the steps ...
We are using a McAfee SAAS solution and all incoming Emails flow through the SAAS environment before coming into our C170. McAfee --> C170 --> Exchange, when we test from the SAAS environment the connection is verified but no mail is reaching our E...
Hi all,I have a setup with 3 C6xx and a M1070 used as an external quarantine.On each C6xx there are a couple of interface defined for different mail domain, as relaying interfaces etc.I defined the three C6xx with ssh-enabled interfaces in the manage...
I've been getting 5-10 spam messages a day whereas a week ago I would only get a one or two every few days. Has there been an increase in spam from new botnets? My customers are also receving a lot more spam than normal. CASE has been updated to t...
Hi !I'm configuring an outgoing server (i.e. only a private listener) on ESA C370 with AsyncOS 8.0.1.I use the Internet's Root DNS Servers, and my default SMTP route is empty. My ESA is connected to 3 networks : production (default gateway), administ...
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