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To my understanding the default mail server on Ubuntu is Postfix.

I have Virtualmin and Webmin installed on my Ubuntu installation. I'm trying to figure out where to configure encoding for sending and receiving emails to handle IDN in the email address.

I read somewhere that you can get this to work by changing the encoding on Postfix to SMTPUTF8 or IDNA encoding. Is it possible? If so, how do I change this configuration?

Example of an IDN domain name: 日本語.idn.icann.org.

NOTE: Special characters used in domain name... browsers have built-in support to deal with this. I want to achieve something similar for email addresses for both sending and receiving emails.

c0D3l0g1c
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2 Answers2

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Postfix has SMTPUTF8 enabled by default. See the documentation.

AlexD
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IDN is handled entirely by the client. No configuration change is needed in server components like Postfix to support it. See for example the Wikipedia article on IDN for an explanation.

Tilman Schmidt
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