Problem : #550 5.3.4 SMTPSEND.OverAdvertisedSize; message size exceeds fixed maximum size ##

Problem : #550 5.3.4 SMTPSEND.OverAdvertisedSize; message size exceeds fixed maximum size ##

I have exchange 2007 SP2, and it’s been working fine for about 2 years now.  My limits are at 22mm to send and receive, but I’m not sure why, but now, we can’t send more than like 5 or 6 mb, as I tried to send a test email with 8mb and it failed.
Again, all my limits are at like 22mb, in the hub send connector and for the receive connectors as wel.  How do I fix this?
Any help would be appreciated.  This is what came back to me.

This message was created automatically by the SMTP relay on mail.amazingfacts.org.

A message that you sent could not be delivered to all of its recipients.
The following address(es) failed:

debbie@xxxxxxx.com
SMTP error from remote mail server after end of data:
host xxxxx.com.s7a1.psmtp.com [64.18.6.14]:
552 5.3.4 Message size exceeds fixed maximum message size

—— This is a copy of the message, including all the headers. ——
—— The body of the message is 11753447 characters long; only the first
—— 106000 or so are included here.


Solution : #550 5.3.4 SMTPSEND.OverAdvertisedSize; message size exceeds fixed maximum size ##