Comment 11 for bug 849416

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In , Brian-derocher-q (brian-derocher-q) wrote :

The problem we are experiencing at work is the Exchange server generates the text/html and text/plain alternates for calendar event invitations and these alternatives are blank!

"<html>
...<meta name="Generator" content="Microsoft Exchange Server">
...<div>&nbsp;</div>
...</html>"

Since Thunderbird without Lightning will ignore text/calendar, it correctly displays this blank html message.

So i recommend that if Thunderbird sees text/calendar that at least it tells the user there is a preferred format. This gives the user the option of installing extensions. This could probably be added generically for any type of file.