i can send mails from my iphone through a Microsoft exchange account. when trying to send an email that has an attachment, i get an error: "Cannot send mail: An error occurred while deliverying this message."
I looked around internet for many types of solutions, but they do not work.
- update MasSync.DLL
- give permission to "authenticated users" on %systemroot%\temp
- Update UploadReadAheadSize
Exchange server 2003 on windows server 2003 (IIS5)
ISA Server 2006 which only takes SSL and forwards to Exchange server
Iphone 4 with iOS4.3.5
connection between ISA and Exchange is not SSL btw.
I am not alone in the company with this problem.
testexchangeconnectivity.com has no remarks, everything is ok.