Using SM as outgoing gateway, multi-byte char be garbled.
Problem reported by Tki - 9/26/2018 at 5:21 AM
When I send japanese message from windows server(VBS using mail DLL) through local SmarterMail, the Content-Type and  Content-Transfer-Encoding headers are replaced. So, this caused charactors be garbled.
Content-Type changed ISO-2022-JP to utf-8,
Content-Transfer-Encoding changed 7bit to quoted-printable.
Strangely using MUA(or telnet to this SM) from windows PC to this SM does not make it garbled. 
I have set up SmarterMail as outgoing gateway, doesn't using a domain, with disabling antispam or antivirus.
SmarterMail Ver is 16.3.6642 on Windows Server 2012 R2 Std.
I has been using other version such as SM Ver 14.4 or 10.3 on Windows 2008 R2, those has no problem.
This happen on Free edition but I'm using Enterprise edition(old version) as company's MTA. If this problem not resolved, I cant upgrade to newest version or using SmarterMail anymore.
Please let me know if there is any solutions.

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Tki Replied
So anyone have no idea, I have updated to the newest version, 16.3.6885.
This treat corrected the problem.
I dont know if SmarterTools tech fix this problem...
Thanks anyway.

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