Multipart email with text and calendar: Outlook doesn't recognize ics
问题 I have problems with Outlook 2007. When sending a "multipart/alternative" email with a "text/calendar" part, Outlook recognizes the calendar event, that's how it has to be. But when adding a "text/plain" part, Outlook only displays the plain text, the calendar part is missing (but it's present in the source code of the email). The source looks like this: [...] Content-Type: multipart/alternative; boundary="_=_swift_v4_138243630552664dd1bc83e_=_" --_=_swift_v4_138243630552664dd1bc83e_=_