You should see the attachment (annex) pane at the bottom of the message, no matter if it's opened in the Message Pane, a tab or window. Can you post a picture of a message with an attachment?

https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem

Sorry, buth there is nothing to see where I can click or open the "annex". My question is: what do I have to change to see the "annex". When I receive another mail where I cannot see the Annex I would make a copy of this page and send ik to you.

Greatings Roger

The attachment pane is shown by default, unless your TB window layout is broken; the small triangle next to the "1 attachment" text can be clicked to expand or collapse the pane.

Send yourself a message with a jpg attachment and see if the received message looks similar to the picture I posted.

I hope you don't have an anti-virus program blocking attachments.

I don't see any picture of you when I receive your mail. When I sent a mail to myself I can see the picture .jpg which was attached and also the picture that I sent with the text. My virusscanner is Norton360 Premier Edition.

I sent you herewith a copy of your mail.

greatings Roger

that email contains an embedded, not attached image. If you want to see embedded images as attachments, install this add-on https://addons.mozilla.org/en-US/thunderbird/addon/show-all-body-parts/?src=search

And then from the View menu (Alt+V) > Message Body As > and select all body parts.

However the actual example you chose is a remote image and is not included in the mail at all to be an attachment.

Problem still remains. See copy:

All I see is a blank email.

I think that I found my problem and so there is now no problem any more. I could change the maximum of large of the annex. It was 5 megabyte and I could change it into 10 megabyte. From the moment I could change into 10 megabyte, I didn' have no problem anymore to receive mails with annex of .pps.

So anything is now allright.

Greatings Roger