Attachment Management is the set of policies that determine which file types are allowed through by email.
Mimecast provides you with a default definition for determining what attachment types should be handled. This covers the most common file types you will encounter.
You can choose to have Mimecast perform one of the following actions for attachments:
Allow – The attachment is delivered as normal. Link – The attachment is removed from the email and replaced with a link to download the file. Hold – The email is held by Mimecast, requiring it to be released before them email is delivered to the recipient Block – The email is delivered without the attachment
You can also have an action performed based on the size of the file. For example blocking PDF files over 10MB.
Detections for Attachment Management can be set on both file extension and MIME type.
The Attachment Definition is the settings that will be applied when a policy is triggered. You must configure the Definition first.
Set Set Attachment Management Policy to definition you created using the Lookup button
Note: When using the definition lookup, you will need to select the folder the definition is located in and use the Select option. Clicking into the definition on this screen will take you to the editing screen for it.
Set the scope for the policy under Emails From and Emails To
Press Save & Exit
Only one Attachment Management Policy will apply to an email. If you need to ensure a particular policy is picked, you should enable the Policy Override option within the policy.