I am under Lubuntu 12.10 with thunderbird 16.0.2

When I send a pdf file, people who receive it cannot open this pdf with acrobat or evince. It appears that in the source of the mail, thunderbird said that my pdf file is a plain/text file instead of a binary or a pdf file.

I look at this http://kb.mozillazine.org/Send_plain_text_attachments_as_real_attachments but it does not solve my problem.


Check if attached .pdf files are automatically opened with e.g. Acrobat when clicking on an attachment (by opening your Thunderbird's preferences).

For me, the problem occurred as soon as I determined to not to be asked anymore what application I want the .pdf to be opened with. All outgoing mails immediately stopped having proper .pdf's attached.

I reset it to "ask me" and .pdf's are .pdf's again...

  • Pdf document are seted to "ask me". But I have 2 lines for pdf document. One with application/pdf:.pdf and another with image/%22pdf?.... Should I delete the second ? – Ger Jan 28 '13 at 12:32
  • The second one (image/%22pdf?...) seems to be an invalid MIME type. You could delete this without affecting functionality of downloads/attachments with valid MIME types. Nevertheless, resetting application/pdf:.pdf should bring back proper .pdf attachments, doesn't it? – user127066 Feb 1 '13 at 18:42
  • @user127066 Please use the contact us link at the bottom of this page to ask for your unregistered account and your new registered account to be merged. Thanks. – fossfreedom Feb 2 '13 at 9:00

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