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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 worklo...

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

Iron port c170 HA mode deployment

Dear Cisco,I got two ironprot C170 for HA deployment for e mail security.I am new with ironport but i have experience on Cisco ASA appliences configured in HA mode.Please give me brief idea about the HA mode installation and basic requirmnet for iron...

Critical message error

We have upgraded Async OS from 7.1.3 to 7.5.1-028 and we are encoutiering below mentioned error frequently. Also we have noticed Content Rule and Content Rule updates within Ironport Antispam as unavailable. Even after we click update now we still se...

Resolved! Can't report forwarded mail?

Hi,I figured that with the IronPort Outlook Plug-in, I could have users forward spam to me as an attachment, and then report it to Cisco.  However, if I open a message that was forwarded as an attachment and press one of the reporting buttons, I get ...

Traceability of changes via GUI

Hi allI have the requirement that ALL configuration changes (CLI and GUI) are traceable (=logs sent to our central syslog server).For CLI changes, I just had to create a new cli-logs-subscription and forward the logs to the syslog server. Now every c...

Resolved! Ironport ESA message size overhead?

Hi all,Does the Ironport ESA add any overhead to a message that would inflate the size? For instance, if a message enters the processing queue at 15Mb, is it going to be (noticeably) larger by the time it hits our Exchange server?Thanks,SteveSent fr...

ESA Authentication Log

Hi all,We have two IronPort Email Security Appliances and one Management Security Appliance.  I just took a look at the authentication log on one of my ESAs and I saw that the user "smaduser" was connecting from the MSA every few seconds.  This makes...

Ironport C150 LDAP group query fails

Hello,We have a question about LdaP group query against standard Active Directory group "Domain Users".Such query fails for all users I've tested, while queries from other groups are succeeding.I've already read this related thread: https://supportfo...

Nikolay__ by • Level 1
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  • 1 replies
  • 0 Helpful votes

v7.5.1-028 avalible?

Ironport v7.5.1-028 was avalible on one Ironport but not the other. And I may have been stupid and made the upgrade on the first, but then noticed not beeing able to upgrade to more than 7.1.5-017. Both were from 7.1.3-010. Avalible upgrades just don...

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