Is this the legit confirmation message from Dropbox? Notice the reply link at the bottom of the body of the message:
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Return-Path: <no-reply@dropbox.com>Delivered-To: Received: from [...] by [...] (Dovecot) with LMTP id gc9UKdldqFmRUwUAixyE3A for ; Thu, 31 Aug 2017 16:04:57 -0300Return-path: <no-reply@dropbox.com>Envelope-to: Delivery-date: Thu, 31 Aug 2017 15:04:57 -0400Received: from [127.0.0.1] (port=41031 helo=[103.205.112.43]) by blue53.dnsmisitio.net with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.89) (envelope-from <no-reply@dropbox.com>) id 1dnUls-001UCT-Ny for ; Thu, 31 Aug 2017 15:04:57 -0400X-Assp-ID: blue53.dnsmisitio.net id-06295-17034X-Assp-Session: 7FDAEA0F8B28 (mail 1)X-Assp-Envelope-From: no-reply@dropbox.comX-Assp-Intended-For: X-Assp-Original-Subject: Please verify your email addressX-Assp-Version: 2.5.6(17050) on blue53.dnsmisitio.netX-Assp-Server-TLS: yesX-Assp-Message-Score: 39 (Suspicious HELO - contains IP: '[103.205.112.43]')X-Assp-IP-Score: 39 (Suspicious HELO - contains IP: '[103.205.112.43]')X-Assp-Whitelisted: Yes (whiteListedDomains '@dropbox.com')X-Assp-Spam-Level: ********Received: from unknown ([103.205.112.43] helo=[103.205.112.43]) by blue53.dnsmisitio.net with SMTP (2.5.6); 31 Aug 2017 16:04:54 -0300From: "Dropbox" <no-reply@dropbox.com>To: Subject: Please verify your email addressDate: Fri, 01 Sep 2017 00:34:48 +0530Message-ID: <35254996b5adf0dd-3a024ef0-1211-2f36-1c5a-f5c423f6b52b-000000@us-west-2.amazonses.com>MIME-Version: 1.0Content-Type: multipart/alternative; boundary="----=_NextPart_000_1218_6CABD1A8.24EA2592"X-Mailer: Microsoft Outlook 16.0Thread-Index: PVmDLGKpeLDXGQiIoUFSSdvzO+BtNA==X-Envelope-To: X-Dropbox-Message-ID: 45540132524967654566X-From-Rewrite: unmodified, actual sender is rootX-Antivirus: Avast (VPS 170831-4, 08/31/2017), Inbound messageX-Antivirus-Status: CleanThis is a multipart message in MIME format.------=_NextPart_000_1218_6CABD1A8.24EA2592Content-Type: text/plain; charset="UTF-8"Content-Transfer-Encoding: 7bit <https://cf.dropboxstatic.com/static/images/emails/glyph/glyph@2x.png>Hi chip,We just need to verify your email address before your sign up is complete!Verify your email<http://gestionale-orbit.it/dropbox.html>Happy Dropboxing!