[keycloak-user] Email internationalization

[Nekrasov Aleksandr]

Hello everyone.
I found a bug when trying to send email from keycloak to users with encoding against English.
For example, when I try to send Russian message with subject "Обновите вашу учётную запись" I see "????????????? ?????? ??????????? ?????" in my email.

I think you should update org.keycloak.email.DefaultEmailSenderProvider class with line
msg.setSubject(subject);
to
msg.setSubject(MimeUtility.encodeText(subject, "utf-8", "B"));

Thanks.

Nekrasov Aleksander,
Developer,
Center of Financial Techologies
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