Receiving attachments via pop3 adapter of Microsoft Biztalk Server 2006 is possible using f.ex. an orchestration (www.commercelab.de/allgemeines/empfangen-von-emails-mit-attachment-und-speichern-der-angefugten-dateien-unter-ihrem-ursprunglichen-namen/). Receiving text/xml attachments you have to set the property BodyPart Contentelement in the pop3 configuration of your receive port to text/plain. With this options it is possible to receive any kind of attachments.

Without this configuration you wil get a XLANG error: WrongBodyPartException.