Attachment Hold on Size Policies

Document created by user.oxriBaJeN4 Employee on Sep 11, 2015Last modified by user.oxriBaJeN4 Employee on Mar 27, 2017
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An Attachment Hold on Size policy allows Administrators to set restrictions on the maximum attachment size for inbound and outbound messages. However unlike Attachment Sets which applies to specific attachment types, an Attachment Hold on Size policy applies to all attachment file types. If an email attachment breaches this policy, the message is placed in a queue, and a notification sent to the recipient.


What you need


  • An Administrator Console logon with access to the Administration | Gateway | Policies menu item.




Unlike other attachment policies like Attachment Block on Hold, this policy type offers the option of blocking but releasing the attachment. If the attachment file size exceeds the specified limit, the files are blocked forcing the recipient to release them from a hold queue. This can be a useful way of ensuring files of a particular size never get through, whilst others can be placed on hold and released as required.


Take the following example:


  • An Attachment Hold on Size policy specifies that attachments that exceed 2000 KB are placed on hold and released as required.
  • An Attachment Block on Hold policy specifies that attachments that exceed 5000 KB are blocked and cannot be released.

This policy has priority over the Attachment Link on Size Policy.

Creating a policy


To create a policy, follow the instructions in the Creating / Changing a Policy article, but using the following options:


Policy NarrativeProvide a description for the Policy to allow you to easily identify it in the future.
Hold Attachments Larger Than (KB)

Specify a value in Kilobytes for the maximum file size of all attachments in a message. Any attachments that exceed this limit are placed on hold and not delivered with the message. For example if 1000 KB is specified and a message has two attachments of 550 KB each, both attachments are placed on hold.

When handling archive files (e.g. .zip) the threshold applies to the uncompressed file size of the attachment. This adds protection against large, highly compressed archived files.


Definition required?