Missing Mime type - Emails cannot be displayed

[ballyhoo62]

I wrote two Mails directly to Kostya Vasilyev at kmansoft (at) gmail.com but did not receive an answer.

As this is a very important issue I´m dealing with, I try to go this way.

When I receive mails from a very important client with attachment I cannot read them, because they are not displayed correctly.

My investigations showed, that their Mail client is not sending the MIME type, so that AquaMail is displaying it as text.

Von: "XXXXXXXX" <XXXXXXXXXXXX>
Datum: 20. Mai 2015 21:41:46
Betreff: Re: Subject
An: Me <XXXXXXXXXXXX>
CC: "other" <XXXXXXXXXXXX>

--0__=4EBBF4D8DFF864B18f9e8a93df938690918c4EBBF4D8DFF864B1
Content-type: multipart/alternative;
   Boundary="1__=4EBBF4D8DFF864B18f9e8a93df938690918c4EBBF4D8DFF864B1"


--1__=4EBBF4D8DFF864B18f9e8a93df938690918c4EBBF4D8DFF864B1
Content-Transfer-Encoding: base64
Content-type: text/plain; charset=UTF-8

SGFsbG8gSGVyciBIb3JzdCwKCm5hIGRhcyBnaW5nIGphIGZpeCAtIERhbmtlc2Now7ZuIQpKYSwg
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Well other Mail clients as Mail on OSX or Thunderbird are displaying the Mails correctly, so why not AquaMail?

Hope you can help solving this issue.

[Kostya Vasilyev]

Sorry about the mails -- I've searched by your email, and didn't find any messages...

Maybe Gmail put your messages into spam for some reason. I've now created a filter to avoid this, feel free to write again.

Now, text/plain is the default MIME type if none is present.

Also your message snippet above has top level MIME type as "multipart/alternative" which is used to encode:

"this is message text as HTML, and this is same text again as plain text, choose whichever you can display"

and not attachments.

I'd need to see the exact original message source. Easy to obtain in Gmail / web and other web mail systems too, I suppose.

Or "forward as .eml attachment" in your desktop mail app if you use one.

[ballyhoo62]

Thank you for your reply Kostya.

I thought that something like spam-filtering has occurred.

I send the info once again and hope it will arrive.

Thank you for your help in advance

Christian

[ballyhoo62]

Kostya provided a perfect solution and now it works like a charm...

Thanks a lot to this outstanding developer 

[Kostya Vasilyev]

It's Courier IMAP's insistence of there being a MIME-Version header, and reporting whole message as text/plain if the header is missing.

Bad decision if you ask me, but then it's their mail server, not mine...

I had to add a workaround, to detect Courier-IMAP, to detect this case, and to fetch and parse messages into parts myself....