Email Protection - Barracuda

Last updated: 2025-07-23 3:37:00 PM

Goal: Manage email communications security to protect against viruses, spam, phishing attacks, etc. while minimizing the blocking of legitimate emails.

Check Barracuda Logs:

Email Gateway Defense (Email Security) / Reports
1. Top Outbound Blocked Senders: list accounts that have been blocked from sending mail

Email Gateway Defense (Email Security) / ATP Log / Suspicious

Email Gateway Defense (Email Security) / Outbound Quarantine

Email Gateway Defense (Email Security) / Overview / Message Log
1. Filter: Inbound & Deferred

Barracuda Block or Exempt:

Rules can be applied either at an agency level (3H) or submitted to Barracuda.

3H: managed by 3H in a static manner and only applies to domains or specific email addresses.

Barracuda: exemptions can be managed by Barracuda support and will be integrated within their machine learning algorithms, but cannot be assured if, when and how block will be implemented.

3H: Email Gateway Defense (Email Security) / Inbound Settings / Sender Policies
1. Block or Exempt at a domain level

Barracuda: Email Gateway Defense (Email Security) / Overview / Message Log
1. Filter: Inbound & Deferred
2. Select email and select ‘Report as incorrectly blocked’

Exchange Blocked email:

Microsoft Exchange email service can also be incorrectly blocking emails. This is mostly the case for emails with attachments.

Go to Microsoft Defender / Review / Quarantine / Email https://security.microsoft.com/quarantine
1. To unblock an email select the email and Release

Note: Do not delete the email. The ‘Release by’ column offers a status and it will fall of the list after 30 days.

Property of Three H Furniture Systems

Please return this document to the IT department