Di seguito è l'e-mail con le intestazioni. Non mi sono mai registrato sul sito, quindi è chiaramente un phishing, ma i collegamenti nell'e-mail indicano il vero sito Avast. Anche il percorso di consegna sembra legittimo poiché entrambi gli indirizzi IP (77.234.40.28 e 5.45.62.32) appartengono ad Avast secondo whois. Ho ricevuto questo tramite il mio server SMTP Postfix.
Posso pensare solo a due spiegazioni:
- Avast sta inviando spam alle persone per aumentare la propria base di utenti (improbabile?)
- Qualcuno registrato utilizzando il mio indirizzo email (accidentalmente?)
C'è una spiegazione alternativa che mi è sfuggita?
Return-Path: <[email protected]>
X-Original-To: [email protected]
Delivered-To: [email protected]
X-Greylist: delayed 00:06:20 by SQLgrey-1.8.0
Received: from prg18.ff.avast.com (prg18.ff.avast.com [77.234.40.28])
by helios.redacted.com (Postfix) with ESMTP id 29FDE338513
for <[email protected]>; Tue, 24 Feb 2015 16:31:39 +0000 (UTC)
Received: from ams01-022.ff.avast.com (ams01-022.ff.avast.com [5.45.62.32])
by prg18.ff.avast.com (Postfix) with ESMTP id 4AC4863FE
for <[email protected]>; Tue, 24 Feb 2015 17:25:18 +0100 (CET)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=avast.com;
s=default; t=1424795118;
bh=xtbTFzHy9Gx8+0K7moXgMhL46s4Nd1+AiW/7CP7eGo4=;
h=Date:From:To:Subject;
b=KsOT6/s2YsnQ4P1ZSpgzbOjusgVHCzTBc/y2UdqTzbFec9rIMF4ayuzx1fmKpsIeh
56CkPMIriPpJ/w8rNIEAA74rqUtXaTa6P+8CF+ePo0cDurc5+zvTFBLdx29NxWzpNa
Pdsm/tnBF7mWyY67HAFIlNgKGiDq2YUX+rB/jp2I=
Received: from ams01-022.ff.avast.com (localhost [127.0.0.1])
by ams01-022.ff.avast.com (Postfix) with ESMTP id 2EE47120243
for <[email protected]>; Tue, 24 Feb 2015 17:25:18 +0100 (CET)
Date: Tue, 24 Feb 2015 17:25:18 +0100 (CET)
From: AVAST Software <[email protected]>
To: [email protected]
Message-ID: <2116255645.5085975.1424795118191.JavaMail.id@ams01-022.ff.avast.com>
Subject: =?utf-8?Q?Avast_antivirus_account_=E2=80=93_please_confirm?=
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_Part_5085973_1976669953.1424795118189"
------=_Part_5085973_1976669953.1424795118189
Content-Type: multipart/alternative;
boundary="----=_Part_5085974_319880981.1424795118189"
------=_Part_5085974_319880981.1424795118189
Content-Type: text/html;
charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<?xml version=3D"1.0" encoding=3D"UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www=
.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns=3D"http://www.w3.org/1999/xhtml" xml:lang=3D"cs" lang=3D"cs">
<head>
=09<meta http-equiv=3D"content-type" content=3D"text/html; charset=3Dutf-8"=
/>
</head>
<body>
=09<div style=3D"padding-bottom:5px;"></div>You recently registered an AVAS=
T Account. <br/><br/> Please click this link to verify your account: <br/><=
br/> <a href=3D"https://id.avast.com/en-us/confirm/registration?token=3DN1r=
34hqKcwm6mBRkqLFub05pnfriPWmujAtoDTpqMhNH3FTE1T">https://id.avast.com/en-us=
/confirm/registration?token=3DN1r34hqKcwm6mBRkqLFub05pnfriPWmujAtoDTpqMhNH3=
FTE1T</a> <br/><br/> NOTE: Information email only =E2=80=93 PLEASE DO NOT R=
EPLY <br/><br/>AVAST Software<div style=3D"padding-top:5px;"><a href=3D"htt=
p://www.avast.com">http://www.avast.com</a></div>
</body>
</html>
------=_Part_5085974_319880981.1424795118189--
------=_Part_5085973_1976669953.1424795118189--
Ecco il registro delle transazioni SMTP:
Feb 24 16:25:19 helios postfix/smtpd[28347]: connect from prg18.ff.avast.com[77.234.40.28]
Feb 24 16:25:19 helios sqlgrey: grey: new: 77.234.40(77.234.40.28), [email protected] -> [email protected]
Feb 24 16:25:19 helios postfix/smtpd[28347]: NOQUEUE: reject: RCPT from prg18.ff.avast.com[77.234.40.28]: 450 4.7.1 <[email protected]>: Recipient address rejected: Greylisted for 5 minutes; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<prg18.ff.avast.com>
Feb 24 16:25:19 helios postfix/smtpd[28347]: disconnect from prg18.ff.avast.com[77.234.40.28]
Feb 24 16:28:39 helios postfix/anvil[28329]: statistics: max connection rate 2/60s for (smtp:66.45.103.63) at Feb 24 16:23:23
Feb 24 16:28:39 helios postfix/anvil[28329]: statistics: max connection count 2 for (smtp:66.45.103.63) at Feb 24 16:23:23
Feb 24 16:28:39 helios postfix/anvil[28329]: statistics: max cache size 1 at Feb 24 16:23:22
Feb 24 16:31:38 helios postfix/smtpd[28367]: connect from prg18.ff.avast.com[77.234.40.28]
Feb 24 16:31:39 helios sqlgrey: grey: reconnect ok: 77.234.40(77.234.40.28), [email protected] -> [email protected] (00:06:20)
Feb 24 16:31:39 helios sqlgrey: grey: from awl: 77.234.40, [email protected] added
Feb 24 16:31:39 helios postfix/smtpd[28367]: 29FDE338513: client=prg18.ff.avast.com[77.234.40.28]
Feb 24 16:31:39 helios postfix/cleanup[28370]: 29FDE338513: message-id=<2116255645.5085975.1424795118191.JavaMail.id@ams01-022.ff.avast.com>
Feb 24 16:31:39 helios postfix/qmgr[13941]: 29FDE338513: from=<[email protected]>, size=2691, nrcpt=1 (queue active)
Feb 24 16:31:39 helios postfix/smtpd[28367]: disconnect from prg18.ff.avast.com[77.234.40.28]
Feb 24 16:31:39 helios postfix/local[28371]: 29FDE338513: to=<[email protected]>, orig_to=<[email protected]>, relay=local, delay=0.3, delays=0.26/0.03/0/0.01, dsn=2.0.0, status=sent (delivered to mailbox)
Feb 24 16:31:39 helios postfix/qmgr[13941]: 29FDE338513: removed