Does feel slightly annoying going through all this for a very simple fix! As far as I can tell there's no way to change this unless they are a contact, as even adding them as a contact doesn't help.Īnyway, by typing the start of an email in so it appears in the auto suggest then clicking the 'X' to delete it before adding it again seems to have solved the issue. All of the problem emails seem to somehow have gotten the preferred format messed up. I discovered that all the problematic email addresses added to my Outlook 2016 client were added and being used through the auto suggest feature (and not listed under a contact). HE1P135MB0172051D83C8A6E34E6517A5DA7E0HE1P195FQ0132EURPĬontent-Disposition: attachment filename='winmail.dat'Ĭontent-Type: application/ms-tnef name='winmail.dat' However, in the email that lost it's forwarding it contained this instead: Osoft-comoffice' xmlns:w=3D'urn:schemas-microsoft-com:office:word' =
In the email that worked properly the header contained: Okay, this issue has definitively been interesting.