How to View On Hold Messages in Mimecast

Mimecast’s On Hold Messages feature allows users to review and take action on emails that have been temporarily quarantined. These messages are held due to spam detection, policy violations, or suspicious content—but they aren’t deleted. You can view, permit, or reject them, helping ensure that no important communication is missed.

For each message, you’ll see:

Sender email address

Subject line

Date received

Reason held (e.g., spam, suspicious content, policy rule)

Click on a message to view more detailed content, including headers and message body (if allowed by admin settings).

Next to each message, you can choose:

🛑 Report: Flags the email as spam or phishing and sends the message to Mimecast for further analysis.

👍 Release: Delivers the message and allows future emails from the same sender.

👎 Reject: Prevents future emails from the sender and deletes the current message.

⚠️ Note: If the message is part of a phishing campaign or looks suspicious, contact IT before releasing it.

• Regularly check your On Hold Messages (if you don’t receive Digest Emails)
• Avoid over-permitting—only approve senders you trust
• Be cautious with messages marked as phishing or containing dangerous attachments
• Contact IT if something critical is being blocked frequently