Problem receiving attachments from Exchange 2007 server

Each time one of our vendors sends an e-mail with an attachment, we do not receive the attachment but the content of the attachment embedded within the body of the message.

Content-Type: multipart/alternative;

            boundary="_000_678D55D6FCB0FA41B56B066127C85D900D920A7824company2k7LI_"

Content-Language: en-US

000_678D55D6FCB0FA41B56B066127C85D900D920A7824company2k7LI

Content-Transfer-Encoding: quoted-printable

Content-Type: text/plain; charset=“us-ascii”

<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=

hemas-microsoft-com:office:word" xmlns=3D"HTML 4.01 Specification">

<meta http-equiv=3DContent-Type content=3D"text/html; charset=3Dus-ascii">

<meta name=3DGenerator content=3D"Microsoft Word 11 (filtered medium)">

The vendor is telling us that the problem is that our version of Domino (6.5.2) is incompatible with Exchange 2007 and we would need to upgrade to Domino 8 to correct the problem. Is this a true statement?

Thank you .

Anita