Loris Bennett [2017-06-26 08:07:23+02] wrote:

> What's the easiest way to display the total size, i.e. including
> attachments, of a mail or posting?

In summary buffer the raw message content can be piped to external
command with "|" key. So "| wc" counts lines and bytes. The raw message
content can be displayed with "C-u g". Then on that buffer "M-x
count-words" count lines, words and characters.

With custom Emacs Lisp code these function are likely useful:

    (gnus-summary-show-raw-article)
    (get-buffer gnus-article-buffer)

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