After upgrading from 2.3.2 to 2.3.3a sending mail from Outlook does not work as before. Some part of message get lost.

Message after it arrives:

Return-Path: <from@domain.tld>
Delivered-To: <to@domain.tld>
Received: from mail.domain.tld
by mail.domain.tld (Dovecot) with LMTP id FgefGFa5TlYcaQAAvgKw6Q
for <to@domain.tld>; Fri, 20 Nov 2015 08:11:25 +0200
Received: from localhost (localhost [127.0.0.1])
by mail.domain.tld (Postfix) with ESMTP id 46DC13EC96
for <to@domain.tld>; Fri, 20 Nov 2015 08:11:25 +0200 (EET)
X-Virus-Scanned: Debian amavisd-new at mail.domain.tld
Received: from mail.domain.tld ([127.0.0.1])
by localhost (mail.domain.tld [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id Vt9zRDFLbx0G for <to@domain.tld>;
Fri, 20 Nov 2015 08:11:22 +0200 (EET)
Received: from localhost (localhost [127.0.0.1])
by mail.domain.tld (Postfix) with ESMTP id BD9B33EC95
for <to@domain.tld>; Fri, 20 Nov 2015 08:11:22 +0200 (EET)
From: =?utf-8?q?Veli-Matti_Lepp=C3=A4nen?= <from@domain.tld>
Message-Id: <20151120061122.BD9B33EC95@mail.domain.tld>
Date: Fri, 20 Nov 2015 08:11:22 +0200 (EET)

from@domain.tld>
To: <to@domain.tld>
Subject: testing
Date: Fri, 20 Nov 2015 08:11:21 +0200
Message-ID: <001301d1235a$46e9c7d0$d4bd5770$@domain.tld>
MIME-Version: 1.0
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Outlook 16.0
Thread-Index: AdEjWkXErWl9rmSPSPuYzbxMH4yXdg==
Content-Language: fi

Test message