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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.

 

Forum Posts

  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
  • 880 Views
  • 2 replies
  • 0 Helpful votes

Hi,we have Cisco-c600v with Async-Os 15.0.0-104 and I get somme mails bounced with error:SMTPUTF8 is required, but was not offered by host cisco-c600v-1.xxx.xx [xxx.xxx.xxx.xxx]How to enable smptuf8 on theses appliances, I don't see anymore in the do...

Hello,I'm writing here because this is the only place I found in order to reach Cisco people.I'm not a Cisco customer but just a postmaster of a small business trying to sending mail to domains managed by IronPort solution.The issue refers to DKIM al...

ptitoliv by Level 1
  • 927 Views
  • 5 replies
  • 0 Helpful votes

Hi, In the VM install guide of AsyncOS VM https://www.cisco.com/c/dam/en/us/td/docs/security/content_security/virtual_appliances/Cisco_Content_Security_Virtual_Appliance_Install_Guide.pdf In Virtual Appliance Models for VMWare ESXi Deployments, it is...

REJR77 by Level 1
  • 2794 Views
  • 6 replies
  • 0 Helpful votes

Hello,We have some spam messages coming in, and when we researching them through Message Tracking, I have noticed there is a line about adding a recipient.Message XXXXXXX on incoming connection (ICID XXXXXX) added recipient (user@user.com).The email ...

joshuaer by Level 1
  • 606 Views
  • 1 replies
  • 0 Helpful votes

Hello All,Need to configure an DLP Policies in which when users share their government id details Like Pan card/Aadhar Card that details should not go outside of organisation. Below im attaching an sample copy of Pan card and Aadhar card    

sample pan-card.jpg 29a91b16-e999-4bae-9367-c4fdf4ccd2d9.png
sv7 by Level 3
  • 1244 Views
  • 4 replies
  • 0 Helpful votes

Hi Community,Based on the configuration below, i'ld expect this behavior:Sending server tries to deliver e-mail to john.smith@dzhyp.deReceiving server bounces e-mail (e.g. due to wrong recipient) and gives back a bounce-mail with sender e-mail postma...

aossigno_3-1694002254685.png aossigno_0-1694002254672.png aossigno_1-1694002254679.png aossigno_2-1694002254680.png
aossigno by Level 1
  • 676 Views
  • 0 replies
  • 0 Helpful votes

Hello,Apologies if this post is in the wrong community.I'm having trouble with my legacy Spamcop email account.  I believe that Cisco now owns the Spamcop servers.  But I cannot find a point of contact for my issue.I think that my old Spamcop (cesmai...

SimonHS by Level 1
  • 560 Views
  • 1 replies
  • 0 Helpful votes

Hi, my HDD on C170 is degraded, i already contacted Cisco on this since it is still under warranty they replaced it. as er checking on Cisco's site i need to shutdown the ESA, but i think it is hot swappable so i assume i can just pull the HDD. i nee...

If we have an Action applied on Message based on SDR verdict defined in Global Settings, do we still need a Content or Message filter for further action? Currently set to Reject: Awful in Sender Domain Reputation Overview.Thanks.