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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
  • 330 Views
  • 2 replies
  • 0 Helpful votes

Content Filters Disclaimers

We have a content filter that look for the word "confidential" In email body and attachment, we keep getting hits on the contents of disclaimers we can exclude our disclaimers because we know the text the issue comes from 3rd party disclaimers where ...

Upgrading AsysncOS on C360 & C370's

Hello,At work I have just inherited (4) Ironport C360 and (4) Ironport C370 running AsyncOS 7.0.1-010 for email. I need to update them to 7.6.3-019, as this is the latest approved code for our enterprise. In the reading that I have it looks like I wi...

dlarimore by • Level 1
  • 864 Views
  • 3 replies
  • 0 Helpful votes

High Water mark for ESA

Good Day! I have a quick question for y'all, basically I have a client using the ESA and they are preparing to go through a renewal.  They bought 500 seats, but they don't know if they need to increase or decrease this license.  The question I have i...

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

Resolved! Ironport setup

Need a few pointers with ESA setupIncoming MailInternet --> Messagelabs ---> ESA ---> ExchangeExchange --> ESA --> Messagelabs --> Internet Basically my email is routed through Messagelabs and we want to add a layer of security with ESA.  Eventually ...

check spf cache

Hi, Is it possible to check the spf cache for a source IP and recipient email address ?The message tracking shows the DMARC validation, but not the detail. (as there is no DKIM for this domain, I assume SPF is the faulty test).version is ironport clo...

Raid Problem in C160 Ironport

I am getting this error from mt ironport C160  A RAID-event has occurred: RAID Read error (5), 5 read errors total disk 0[READ(offset=69281807872, length=65536)] RAID Read error (5), 6 read errors total disk 0[READ(offset=69283839488, length=65536)] ...

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