Are international characters supported in Postfix?

Solution In Progress - Updated -

Issue

  • How to deliver email to domains with international characters (IDN)?

  • According to upstream postfix this is supported from version 3.x. Is there any way to make this work with postfix version delivered by Red Hat? Or if there is any other preferred workaround? For example åäö which is found in the Swedish locale.

Environment

  • Red Hat Enterprise Linux 7

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