What do I need to modify to allow these messages to come through.

I am getting a bounce back sending email within my domain to another user.

Reason: 5.1.0 - Unknown address error ('552', ['5.3.4 Message size exceeds fixed maximum message size'])

We are using Exchange 2010 and the attachment size was about 10 meg, however I have the send/receive connectors set up to allow up to 100 meg files (for testing purposes) and still no go. Am I missing something here?
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Alan HardistyCo-OwnerCommented:
Please have a read through the following MS Article (also relevant to Exchange 2010) and check your size limits for the receiving user:

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