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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

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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
  • 1518 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Can Ironport handle RAR files?

We're starting to get malicious content embedded in RAR files attached to emails.  This shouldnt be a problem as we have a policy to quarantine any emails with executable attachemnts coming in.It appears that, although the Ironport recognises the .ra...

steveshipway by • Community Member
  • 6130 Views
  • 6 replies
  • 0 Helpful votes

Ironport - Incoming and Outgoing relay

Hi,for my understanding:1) incoming mails and outgoing mails will be classified by the HAT2) HAT entry with relay decision classifies as "outgoing"Now my problem: i am using the same relay server for incoming and outgoing messages. So, my ironport ge...

hskal1986 by • Community Member
  • 13550 Views
  • 3 replies
  • 0 Helpful votes

Resolved! Replace the body of e-mail

Hello,Can I use the command edit-body-text to replace the entire contents of the body of an e-mail?What I'm looking to do in a message filter is replace the contents of an e-mail without caring whats in there already.I just want to overwrite it with ...

Paul Caley by • Community Member
  • 2764 Views
  • 5 replies
  • 0 Helpful votes

Cisco Email IronPort is not sneding email to outside [Errno 61] Connection refused

Dears, I have deployed new ESA C170. for incoming emails it works normally. But when we send email to most of domains like yahoo, hotmail, gmail...etc, the email get stuck and tracking shows ( queued for delivery). Mail logs show the following error:...

mabufardeh by • Frequent Visitor
  • 2160 Views
  • 2 replies
  • 0 Helpful votes

ESA Attachment Whitelisting

We have some new ESAVs installed and currently testing some content filtering, we are using version 8.5.5 build 280.We have a number of other ironport devices installed so I thought I would reference how we have done it in the past with attachment fi...

dj_hyperion by • Community Member
  • 3354 Views
  • 3 replies
  • 0 Helpful votes

sourcefire AMP for email

Hello,we have presently cisco Ironport web and email appliances and we are planning to implement Cisco next generation firewall with Cisco FirePOWER IPS, AMP and URL license for the IPS. So my question is regarding cisco's ironport email. May be my q...

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