We exchange many e-mails with another company, they use Lotus Notes. Most of the time everything's just fine, but there's a problem when replying to certain users' e-mails.

If I reply using our webmail, there's no problem, so it seems like there's something in Outlook (2010 32-bit).

If I reply to, or forward an e-mail from a "problem-user" it looks fine in my Sent box, but the recipient sees the following. What might be the problem?


__sometext?=
=?iso-8859-1?Q?l=E5da_544444703?=
Date: Thu, 9 Feb 2012 14:39:44 +0100
Message-ID: <007b01cce730$48be2890$da3a79b0$@mymail.com>
MIME-Version: 1.0
Content-Type: multipart/related;
boundary="----=_NextPart_000_007C_01CCE738.AA874B80"
X-Mailer: Microsoft Outlook 14.0
Thread-Index: AQLO8v90rMUktx9x0aqvs3q/nQcJkQKg0qdMAgb96hiUCzvDYA==
Content-Language: sv

This is a multipart message in MIME format.

------=_NextPart_000_007C_01CCE738.AA874B80
Content-Type: multipart/alternative;
boundary="----=_NextPart_001_007D_01CCE738.AA874B80"


------=_NextPart_001_007D_01CCE738.AA874B80


Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Nobody who can help me? This is getting really annoying. Our e-mail provider doesn't know how to solve it, neither does our hardware provider.

Really nobody who can help me out here? I'm out of options...