UserProperties and winmail.dat RRS feed

  • Question

  • i have an outlook addin, and i use UserProperties to save some value into MailItem. but every time when the email send, winmail.dat will appear as attachment instead of my real attachment.

    does anyone know how to advoid this happen

    thank you

    Wednesday, December 1, 2010 9:50 PM


  • If you set named properties, Outlook will try to preserve them by sendign the mesage in the TNEF format. You can set a special MAPI property that will prevent Outlook from doing that, but then the user property won't be preserved.
    Dmitry Streblechenko (MVP)
    Redemption - what the Outlook
    Object Model should have been
    • Marked as answer by John83 Zheng Thursday, December 2, 2010 4:31 PM
    Wednesday, December 1, 2010 11:14 PM