"A problem with your document(s) sent to ...@free.kindle.com"

[mag8]

Dear All,
I fired up calibre again today to fetch the usual economist weekly copy, calibre did it fine and sent the email to my usual email address;
i then received an email from amazon saying that a problem occurred.
Pretty strange as I didn't change any other settings.

any suggestions?
this is the body of the email i received

The Kindle Personal Document Service can convert and deliver the following types of documents:
Microsoft Word (.doc, .docx)
Rich Text Format (.rtf)
HTML (.htm, .html)
Text (.txt) documents
Archived documents (zip , x-zip) and compressed archived documents
Mobi book

Images that are of type JPEGs (.jpg), GIFs (.gif), Bitmaps (.bmp), and PNG images (.png).
Adobe PDF (.pdf) documents are delivered without conversion to Kindle DX, Second Generation and Latest Generation Kindles.

Adobe PDF (.pdf) can be converted to Kindle format and delivered on an experimental basis.

If the document that failed belonged to one of the above document types, please ensure the document is not password protected or encrypted. Note that the Latest Generation Kindles support password protected PDFs.

Helpful tips for personal document attachments:
The file size of each attached personal document should be less than 50MB (before compression in a ZIP file)
The email submitted should not contain more than 25 attached personal documents

You can learn more about transferring personal documents to your Kindle in our help pages:
http://www.amazon.com/kindlepersonaldocuments/

If you would like immediate assistance, please contact customer support at +1-866-321-8851 (US customers) or +1-206-266-0927 (International Customers).

Sincerely,
Amazon Kindle Support

[mag8]

Obviously the file i'm sending to my kindle is .mobi

[mag8]

Just fetched "business week" to test...and it's working.
The economist is 3.5 Mb, Business Week is 0.5 Mb

Could this be the issue?!

[itimpi]

There seem to have been a number of reports of problems reported recently of this type when getting news articles sent to the Kindle. I am not sure that a cause has yet been identified.

Have you checked that the mobi file in Calibre is actually OK?

[mag8]

Originally Posted by itimpi

There seem to have been a number of reports of problems reported recently of this type when getting news articles sent to the Kindle. I am not sure that a cause has yet been identified.

Have you checked that the mobi file in Calibre is actually OK?

Yes,
the same file sent via email came throug fine and it's now in my kindle.
I'm puzzled.

[DoctorOhh]

Originally Posted by mag8

Yes,
the same file sent via email came throug fine and it's now in my kindle.
I'm puzzled.

What does this even mean? You sent the file via email and it was accepted? My confusion comes from the fact that the initial error you received the file (are we talking The economist?) was being sent via email. What's the difference?

[Manichean]

There's a similar thread here, although there's no solution yet. It looks to me like this is an error on Amazon's part.

[mag8]

Sorry for not explaining clearly:
At first I had calibre fetching and sending the file itself, which didnt work.
Then I tried emailing it myself to the kindle (through the same email address), and it worked.

[AndySocial]

I got that on a few files this week. I re-sent the exact same email from my "sent" folder in Gmail, and they all came through just fine then. Something about Amazon's recent server updates must have caused a (hopefully temporary) hiccup.