Expression: "With reference to the appended email please be..."

[Tom]

Hi

Does the following sound formal and natural? Any mistakes–especially in the red part?

Dear Colleagues

With reference to the appended below email, please be informed that the material for the Induction Program cannot be sent by email as its size [color=red]exceeds the quota.

I would welcome all suggestions.

Tom

[Mister_Micawber]

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With reference to the email appended below, please be informed that the material for the Induction Program cannot be sent by email as its size exceeds the limit.
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