[jdwyer]

When the user tries to send a message via blackberry he gets an error saying "Invalid Format". He is not sending any attachements. Any ideas? Thanks

[DarkWater]

Could be a bad service book (CMIME)

[jeremyckitching]

Originally Posted by DarkWater

Could be a bad service book (CMIME)

Agreed. Try the following: How do I resend my service books? - BlackBerryFAQ

You may even try deleting all the service books- Options > Advanced Options > Service Books- and then try the above steps.

[jdwyer]

yup right before you both posted I did that and it worked good. Thanks for the reply.