如果相关，该设备是在Android 4.1果冻豆上运行的华硕Eee Pad变压器平板电脑。
I'd like to view the full SMTP headers of a message in the Gmail app, but I haven't found a way to do so. I've also tried the Web client, but it displays a tablet-specific view, even when I've checked "request desktop site".
How can I view SMTP headers in the Gmail app?
If relevant, the device is an Asus Eee Pad Transformer tablet running on Android 4.1 Jelly Bean.
Sadly there's no such option in the official Gmail app.
You can try using a third party mail client with more options such as K-9 Mail: http://k9mail.org/
It is not possible to view headers in the Gmail app; you will need to open the Gmail web app in your browser instead.
Using Chrome (mobile, 47.0.xxxx.xx) on Android (5.0.2), for example,
Go to gmail.com.
Use the three vertical dot menu at upper-right > request desktop site (not sure this step is necessary, but I did it, and it worked).
Use the gmail menu (three vertically-stacked horizontal bars) to the left, above the main window.
Scroll to the bottom and choose "View Gmail in ... Desktop"
Open the email message for which you'd like header information.
Click Show Original just above the window containing the message body.
The header info will appear.
Well, yes SMTP headers can be seen over the Gmail apps.
Is that you are trying to do ?