Exhange 2010 limiting message size for internal users only

Question

Hi,

i want to setup attachment size limit as follow, the goal is to limit internal email size while allowing email sent outside to be delivered to internal users as well for CC purpose regardless of the size.

1. attachment size limit apply when sender and receivers are internal only (in To. Cc. BCC.)
2. limit restriction should not apply when external email ID is mentioned in any field (in To. Cc. BCC.) and message must be delivered to all internal and external users.

Have Tried
created a hub transport rule, Condition: Sender is inside the organization & attachment size, Action: drop with NDR, Exception: when sent to outside the organization.

result:
above rule work fine when a message is sent to internal or external ONLY. but when recipients are mixed inside/outside the message delivers to outside users but drop for internal email IDs.

awaiting and appreciating any valuable suggestions

Answer 1

Hi @kashif Nazeer

I have test the transport rule in my environment and get the same result as yours. This should be an expected behavior. The Exception only works for recipients outside the organization and internal users still meet the requirement so the sender will receive the NDR.

And I'm afraid there is no such automatic way set directly to meet your need.

As a workaround, we could add an exception in the rule you set above: like if the subject include any specify words or phrases. When your internal users want to send mails to both internal and external recipients (meet the attachment size limit), add the specify words in the subject you created above. So the recipients in this mail will receive it successfully.

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Answer 2

Hi, @Joyce Shen - MSFT

thanks for reply, i wish if Microsoft can add "AND" function in Exceptions then it can be achieved [-ExceptIfSentToScope can include both "InOrganization" AND "NotInOrganization"].
adding some specific words in subject line could be a workaround with small number of users, not easy in my environment.

what if we try adding a rule above this (limit rule) to "Tag" all messages when an external ID is present, and then try to add exception in (limit rule) to ignore messages which are tagged.

i will appreciate if you can try it in your lab.

regards,

Kashif

Answer 3

hi,

the following didnt work...

what if we try adding a rule above this (limit rule) to "Tag" all messages when an external ID is present, and then try to add exception in (limit rule) to ignore messages which are tagged.