My email address is sometimes abused as Return-Path in a message, as Reply-To address or as the real address of a nickname.
But these messages lack the basic principle of ALL mail from this site:

* The mailserver diana.intra.grootersnet.nl is mentioned in “Received: ” as recipient:

like the next two headers: Using my webmail-client:

...
Received: from diana.intra.grootersnet.nl (164-210.bbned.dsl.internl.net [217.149.210.164])
by smtp20.nijmegen.internl.net (8.13.8/2.04) with SMTP id p3B8JnQV024393
for
<postmaster @xsnetworks.nl> Mon, 11 Apr 2011 10:19:49 +0200 (CEST)
Received: from LOCALHOST (127.0.0.1)
by diana.intra.grootersnet.nl (V5.6-ECO5, OpenVMS V8.3 Alpha);
Mon, 11 Apr 2011 08:19:47 +0000
Received: from SOYMAIL (some_domain [som.e a.ddr.ess]) by diana.INTRA.GROOTERSNET.NL
(SOYMAIL AXP-1.5.2) with HTTP; Mon, 11 Apr 2011 08:19:45 +0000


when I use Outlook on any machine:
...
Received: from diana.intra.grootersnet.nl (164-210.bbned.dsl.internl.net [217.149.210.164])
by smtp20.nijmegen.internl.net (8.13.8/2.04) with SMTP id p3BImC8u008698
for <willem .grooters@inter.nl.net>; Mon, 11 Apr 2011 20:48:12 +0200 (CEST)
Received: from aphrodite.intra.grootersnet.nl (192.168.0.205)
by diana.intra.grootersnet.nl (V5.6-ECO5, OpenVMS V8.3 Alpha);
Mon, 11 Apr 2011 18:48:11 +0000


Of course, the address of the sender will match the nickname, quite closely. Except for some admin accounts - perhaps.