[neomutt-users] attched filename in unicode broken when received at MS outlook

Kiyoung Park pkyoung at gmail.com
Mon Feb 8 02:24:17 CET 2021

after some research, I found out that this is due to that MS outlook is not
compliant with RFC2231,and that "Instead, mutt will unconditionally use the
encoding specified in RFC2231."
So there is no workaround till outlook supports RFC2231 fully.


2021년 2월 6일 (토) 오전 12:23, Kiyoung Park <pkyoung at gmail.com>님이 작성:

> Hi,
> I am a newbie to use neomutt, and I have a question.
> Attached file with a filename in Korean, and utf-8 encoded,
> is broken when received by MS outlook
> Depending on the version of outlook it is showed as
> "Untitled attachemnt 000032.dat" or some random char sequence
> like "1m__j8.txt". I've attached one in this mail for test.
> When it is received by any other clients like mutt, thunderbird, gmail
> webui,
> there is no problem. Even with 'outlook on Mac', it is okay.
> When it is sent by other clients except mutt, it is also okay.
> It is problem only in case from mutt to MS outlook.
> Neomutts both on Mac and linux have the same issue.
> I am sure that this is the problem of MS outlook not mutt.
> Meanwhile they would fix the issue someday,
> is there any thing I or mutt can do to avoid this problem?
> Thanks.
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