Hier mal ein schönes Beispiel für Ignoranz bzw. Unfähigkeit. Der originale Header des Vlad-Spams:


header:
01: Received: from nm38-vm6.bullet.mail.ne1.yahoo.com (nm38-vm6.bullet.mail.ne1.yahoo.com
02: [98.138.229.150])
03: by xxxxx (Postfix) with SMTP ID: [ID filtered]
04: for xxxxx; Mon, 23 Apr 2012 xx:xx:xx +0200 (CEST)
05: Received: from [98.138.226.177] by nm38.bullet.mail.ne1.yahoo.com with NNFMP;
06: 23 Apr 2012 xx:xx:xx -0000
07: Received: from [68.142.200.224] by tm12.bullet.mail.ne1.yahoo.com with NNFMP;
08: 23 Apr 2012 xx:xx:xx -0000
09: Received: from [66.94.237.108] by t5.bullet.mud.yahoo.com with NNFMP; 23 Apr
10: 2012 xx:xx:xx -0000
11: Received: from [127.0.0.1] by omp1013.access.mail.mud.yahoo.com with NNFMP; 23
12: Apr 2012 xx:xx:xx -0000
13: X-Yahoo-Newman-Property: ymail-3
14: X-Yahoo-Newman-ID: [ID filtered]
15: Received: (qmail 57718 invoked by UID: [UID filtered]
16: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1335217798;
17: bh=kNebWhpo62ZiyfLD+Nn9rTrb5j6+IoO7CXQHsfCX3ys=;
18: h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Reply-To:To:MIME-Version:Content-Type;
19: b=fXyWczMJ9tEorv6alD1nV/P9Rlvb1S57p0x4ctdm4PYsweNTvDrA2gaH2F/P4UOIQnW32D7jiVn8exZyA5V/qWqZ4x8e
20: xXbGcob2bO2NQMe/02HCqVI2Ijc1OnKnRGRP/QJWkQWfudThabxD/Y+7xuyGqGrEr1uD1PQb1fQaig=
21: DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws;
22: s=s1024; d=att.net;
23: h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Reply-To:To:MIME-Version:Content-Type;
24: b=Z+pQrWDA82Gs9Bb55uNp0ulEITxvQZcUHn0lrWUGuDtiL38C71/ygsjzuiXPj9I6dtWsKqhzvSEF0XLzui+SSs4JOp3
25: 02BAM2sFo9d59e7a1kfPpITQFv/orEL+bTTzJjc08GZa8hyWDW1wi25EkvKg8X8nWFHcgi3ivf43nyo=;
26: X-YMail-OSG: qCqcdxUVM1k85eXv6tFqEXmps1Gm_dFJ5_c81Hvg3OX_BvR
27: pHjtCb4h17LRGRUnrPAqPwxuSAQv82PzS26ddlUX3NzWr6gkgU4ayewbqui2
28: s80n9_v9ijotA.f5byirBDtNw3mM9CH4SghSJemDRRmnzgk3kQJTBscfBoYM
29: jGX1dLlHiShwPAsT6eENRmyyFjT3.DvpZS1AW7s5oKrSCRQHmfeEgrkL5Z_c
30: oJdXwoCqJVuMVfqKDMz7w0Eiud3G2pKojNYrFvTcCxMYJ7yDk6D2cHLpkERx
31: G1ZeUDggxkFiMCZyyo.LPLivdlAQxVx2EGd3Fy2Xcv8M3cnFGsPk8kFkOlWp
32: geOl9UjsBCjjtl2iOO9mBfFa2_ciWsVFhG7wImnBpLue_0dt.7n4ObJRVy8Y
33: xbaujCerHUb_kGhnOCPkEVlKZBvV4RHilXXIxrdlU4Pe3SN8ZUAvMIt9qf0_
34: KGnK_CeBGWoBehGcbNonRTHgoDw--
35: Received: from [50.117.56.23] by web181617.mail.ne1.yahoo.com via HTTP; Mon, 23
36: Apr 2012 xx:xx:xx PDT

Daraufhin die Antwort auf meine Beschwerde von Yahoo:

After investigation, we have determined that this email message did not
originate from the Yahoo! Mail system. It appears that the sender of this
message forged the header information to give the impression that it came
from the Yahoo! Mail system.
Aaahhh ja....