Problem

• Changes made to API Manager email templates at <install location>/apigateway/system/conf/apiportal/email, but international characters are seen as ?? or otherwise garbled when the email is actually sent.
• How to enable UTF-8 for API Manager email templates.

Resolution

Add this property to your system/conf/jvm.xml or your groups/group-x/instance-y/conf/jvm.xml file.

<SystemProperty name="mail.mime.charset" value="utf-8" />