Inbound Messages in XML format

Dear all,

we are using Mendelson AS2 tool to send orders to our partners. recently we started using is also for inbound messages (erceiving invoices). the issue is that (despite the fact that the invoices are sent to us in XML format) once received they are not identified as XML files. if the manially (for example) rename the file to *.xml - everything is OK with the structure.

how can we overcome that issue?

Thank you and BRs,
Vladislav Onchev