> Apparently you didn't not change `org-export-html-postamble' so your
> value of `org-export-html-postamble-format' is ignored.
>
> The default value of org-export-email-info is nil, so you need to set
> it to `t' in order to include email info (or email:t in the #+OPTION
> line.)

Aaah. Apparently I didn't understand the doc correctly :/

In fact, I like the #+OPTIONS way best.

Thanks for your help.

--
Michael