Configuring Attachment Link on Size Policies

Document created by user.oxriBaJeN4 Employee on Sep 11, 2015Last modified by user.oxriBaJeN4 Employee on Aug 24, 2017
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Attachment Link on Size policies allow you to specify an attachment size limit on inbound and outbound mail. However rather than denying the recipient access to the attachment, they receive the original message with a notification. The notification contains a link to download the attachments, instead of delivering them to the mail server. This allows you to manage bandwidth and storage challenges, while still keeping up with end user needs.

 

Usage Considerations


Consider the following when configuring a policy:

  • End users cannot release the attachments, as they are placed in the administration on hold queue. Administrators can release attachments via the Administration Console. See the Releasing Emails and Attachments page for further details.
  • Both the Email Size Limits and Attachment Block on Size policies overrule this policy.
  • Users can choose to strip and link attachments over 1MB in size using Mimecast for Outlook.
  • The link to download attachments is valid as long as a message is in your archive (e.g. your maximum retention period).

 

Configuring an Attachment Link on Size Policy

 

To configure an Attachment Link on Size policy:

  1. Log on to the Administration Console.
  2. Click on the Administration menu item. A menu drop down is displayed.
  3. Click on the Gateway | Policies menu item. The Gateway Policy Editor is displayed.
  4. Click on Attachment Link On Size. A list of policies is displayed.
  5. Either select the:
    • Policy to be changed.
    • New Policy button to create a policy.
  6. Complete the Options section as required: Link Attachments Larger Than (KB)
    Field / OptionDescription
    Policy NarrativeProvide a description for the policy to allow you to easily identify it in the future.
    Link 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 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 replaced with links.
    Attachments under 50 KB in size are automatically ignored.
  7. Complete the Emails From and Emails To sections as required:
    Field / OptionDescription
    Addresses Based OnSpecify the email address characteristics the policy is based on. This option is only available in the "Emails From" section. The options are:
    OptionDescription
    The Return Address (Mail Envelope From)This default setting applies the policy to the SMTP address match, based on the message's envelope or true address (i.e. the address used during SMTP transmission).
    The Message From Address (Message Header From)Applies the policy based on the masked address used in the message's header.
    BothApplies the policy based on either the Mail Envelope From or the Message Header From whichever matches. If both match the specified value the Message Header From is used.
    Applies From / ToSpecify the Sender characteristics the policy is based on. For multiple policies, you should apply them from the most to the least specific. The options are:
    OptionDescription
    EveryoneIncludes all email users (i.e. internal and external). This option is only available in the "Emails From" section.
    Internal AddressIncludes only internal organization addresses.
    External AddressIncludes only external organization addresses. This option is only available in the "Emails From" section.
    Email DomainEnables you to specify a domain name to which this policy is applied. The domain name is entered in the Specifically field.
    Address GroupsEnables you to specify a directory or local group. If this option is selected, click on the Lookup button to select a group from the Profile Group field. Once a group has been selected, you can click on the Show Location field to display the group's path.
    Address AttributesEnables you to specify a predefined Attribute. The attribute is selected from the Where Attribute drop down list. Once the Attribute is specified, an attribute value must be entered in the Is Equal To field. This can only be used if attributes have been configured for user accounts.
    Individual Email AddressEnables you to specify an SMTP address. The email address is entered in the Specifically field.
  8. Complete the Validity section as required:
    Field / OptionDescription
    Enable / DisableUse this to enable (default) or disable a policy. If a date range has been specified, the policy will automatically be disabled when the end of the configured date range is reached.
    Set Policy as PerpetualIf the policy's date range has no end date, this field displays "Always On" meaning that the policy never expires.
    Date RangeUse this field to specify a start and / or end date for the policy. If the Eternal option are selected, no date is required.
    Policy OverrideThis overrides the default order that policies are applied. If there are multiple applicable policies, this policy is applied first unless more specific policies of the same type are configured with an override.
    Bi-DirectionalIf selected the policy is applied when the policy's recipient is the sender, and the sender is the recipient.
    Source IP Ranges (n.n.n.n/x)Enter any required Source IP Ranges for the policy. These only apply if the source IP address used to transmit the message data, falls inside or matches the range(s) configured. IP ranges should be entered in CIDR notation.
  9. Click on the Save and Exit button.

 

See Also...

 

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