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...
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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 experts,We are successfully marking external emails with the [EXTERNAL] tag for emails unless the email is in plain text. Is anyone else having this issue?Thanks.Update: Thanks for the walk through. I'm going to check with our email team to ma...
Hello, I wanted to ask a question regarding Cisco SMA message tracking in my customer environment. In the ESA, we have 2 outgoing policies, whitelist and blocking policy, and the email is sent to multiple recipients which splintered the message to bo...
Resolved! Wildcards in safelist
Is it possible to use wildcards/regex in SLBL? Like, for example, allow all senderdomain.com to be safelisted for all my users of recipientdomain.org
If we whitelist sender/domain/IP Address in the HAT and also in the Incoming mail policy, how mail will be processed ?What will take precedence ?
Hello all, I've got a strange behavior, I don't know if t is normal.Multiple times a day (like a hundred) we observe logs in AMP stating first that the recommended action for the file is to send the file for analysis, and then that the fils was not s...
Whenever I send an email to a specific yahoo email user with some attachment, the email was bounced with the following error. What is the probable solution?5.3.0 - Other mail system problem 554-Message not accepted due to failed RFC compliance
Hican any body know ironport listen port 587, We have requirement ,external parter want to send mail our domain , they have restriction on their firewall they are allow port 587 instead of 25. could you please suggest what need to do to allow that pa...
HELLO,is there any possibility to get SPF working when cisco ESA is behind smtp relay?i just added the smtp relay in incoming relay section, and i can see the real public IP of the sender, but SPF always fail, because it see the email was sent from t...
Hi, I have a defang rule for incoming email in Cisco cESA (as per screenshot, just example). There are times when incoming email hit default policy, the defang rule will take action and defang the URL inside the email even though the domain of sender...
Hello everyoneI know that minimum requirements needed to install the license of AMP in ESA appliance.I would like to know :Model ESAVersion AsyncOSRAMthanks to all
Hello, We have to configure LACP on ESA and SMA and would like to check that is it available LACP configuration on Ironports? If it is not available, Can it configure with any type of Link Redundancy? Thanks
In our existing virtual SMA appliance is in Internal zone and ESA appliances are in DMZ. We are now deploying a new SMA appliance as a replacing for our existing virtual SMA device.We are enabling secured centralised SPAM Quarantine access to employe...
Hi Fellows one question , is ironport ESA suppoting automatic backup configuration file? i cant find anything about it , only a external script in Unix/Windows
Hello Guys, We are running on 11.0.0-264 which is pretty old and looking for a firmware upgrade on Cisco ESA Virtual Appliances I heard there are some cipher issues on version 13.X. What would be the most stable version of 13.X series firmware for Ci...
Hi community! I'm test driving ESA C000V virtual appliance with External Threat Feed (ETF) via a taxii server.The ETF is configured to scan incoming mail for url reputation and attachment file info. It was successful in the blocking of malicious urls...
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