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 there, I have a small/big problem internally in the company. An employee is sending thousands of emails to the domain @yahoo.com. With this, the Yahoo has blocked our IP of receiving e-mails. All employees can no longer send email to Yahoo.com. I ...
Hello folks,We are immensely frustrated and inundated by spoofed emails coming from gmail originating as if from company executives. Clearly it is a famous CEO fraud and we followed Cisco's recommendation to block with a dictionary with names of exec...
Please answer to below questions: Does IronPort un-compress the file? How many layers does it un-compress? (if I compress an already compressed file, will it un-compress to the original layer) Is there a max size restriction of the uncompressed f...
Resolved! SMA migration - From M670 to M600v
We are running an old M670 appliance for our email security setup. Collecting logfiles, message tracking etc. Also hosting all quarantaines. Connected to it are two clusters of each two C600v machines. (the M670 is the only physical appliance left).W...
Does someone know the difference and benefits between Senderbase and Service Logs. From Async 13.5 Service Logs will replace senderbase. According to the shared data per solution different data is offered to talos: Senderbase: machine oriented:https:...
Resolved! Critical Error on Ironport MSA
Anyone know where I should be looking to address this issue? Thanks for any help possible. An application fault occurred: ('util/Aquarium.py handleDoubleException|459', "<type 'exceptions.Exception'>", '\n\nAn exception has occurred:\n\nTraceback (m...
Hi community,I am researching for purchasing the essentials bundle for a client however I am puzzled about the CES deployment and the Office 365 Secure Email Inbound Essentials bundle (for a number of boxes 500). I know that ESA VM is the on prem opt...
Resolved! DMARC Notification
Dear All , We are using ESA in our network , we have end user notification is available for SPF/DKIM . Same like we have enabled the DMARC policy for the incoming mail , and put the action to quarantine .Is there any way we can add end user notificat...
Are there any plans for IronPort to implement Sender Rewriting Scheme in AsyncOS? I'm personally not a big fan of SPF and SRS, but like it or not they're being deployed. We use a C300 to operate a mail forwarding service for our alumni (we get the fo...
Hello Community I'm following the doc https://www.cisco.com/c/dam/en/us/td/docs/security/content_security/virtual_appliances/Cisco_Content_Security_Virtual_Appliance_Install_Guide.pdf we have 3 interfaces for the virtual appliance. During configurati...
HiI am using vESA with AsyncOS 13.5.3-10 and I got following errors in reputation log:- Error occurred while connecting your appliance to the Cisco Talos cloud service.- You must not decrypt the HTTPS traffic originating from the appliance on a netwo...
Hello community, is there a report which mails have been released in the last x days?I need a report how many mails have been released from the different quarantines. Thanks a lotAndreas
Resolved! Issue with upgrading C695 appliance
We are in the process of installing a new appliance in a datacenter. The appliance has been licensed and all firewall ports have been opened. We are getting updates from Anti-Spam, Anti-Virus and all other services.At this moment we have an issue upd...
Hi, What difference is there between the ABORTED and the DROPPED action? Thanks.
Hi, Is there a way to encrypt files that are attached inside an email? Thanks Regards,Justin
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