Email Security

cancel
Showing results for 
Search instead for 
Did you mean: 
cancel

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

I have a group in my company that wants to add hundreds of email addresses at a time to a mail policy. They also want to add hundreds of ips to a remote-ip content filter. I was wondering if anybody knew of a max limit before the c670 appliance start...

cale Dunn by Level 1
  • 748 Views
  • 1 replies
  • 0 Helpful votes

I cannot get external SPAM authentication working or SPAM logins. I have a valid LDAP profile configured (tested working), I have added a valid "Spam Quarantine End-User Authentication" with domain assignment working, I have enabled "External Authent...

Resolved! SMA Certificat

Hi all,We use a Cisco M170 (SMA) release 8.3.6.I'v got some questions about the certificat.1/ Is it possible to install a certificat on a M170 ? It is possible (and easy) on ironport Email Appliance (C170) but can i do that on SMA ?2/ If it is not po...

hello,is there any way to disable the "encrypt message" option through a gpo?we have it installed in our citrix farm and it would be great to be able to disable this through a gpo.thanks  

Hi , I already configure the ironport C170 for incoming , outgoing , Content Filtering and Antispam.But Antispam is not working properly. If I send out the email , messsage hearder never show the ironport antispam.I can see the Ironport Antivirus hea...

aung.htwe by Level 1
  • 723 Views
  • 1 replies
  • 0 Helpful votes

Good day, We have Cisco Ironport C170 ESA, I need to know if there is some resource to validate e-mails from a sender. For example, I would make sure that a person who is sending e-mails and not a robot, this could be done with captcha request. If no...

allysson by Level 1
  • 855 Views
  • 0 replies
  • 0 Helpful votes