On 5 Sep 2015 11:25 pm, "Walter Bright via Digitalmars-d" <digitalmars-d@puremagic.com> wrote:
>
> On 9/5/2015 5:54 AM, Adam D. Ruppe wrote:
>>
>> On Saturday, 5 September 2015 at 08:15:06 UTC, Walter Bright wrote:
>>>
>>> And your post did it too.
>>>
>>> If you're using the Thunderbird news reader, typing Cntl-U will show the full
>>> source of the message.
>>
>>
>> This is perfectly normal for emails and such. They are multipart/alternative
>> MIME messages which pack different versions of the same message together and
>> your client picks its preferred one to show you.
>>
>> It is kinda useless because the html version adds zero value, but the text
>> version is still there to so your client should just ignore it.
>
>
> I know, and my client does, but given the size of the n.g. message database, doubling its size for no added value makes it slower.

There's no way to change the Gmail client behaviour.  And I'm assuming that it isn't a recent feature either.