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Question Special characters in local part of email address (Email Address Internationalization standards)

wolfatadfilm

New Pleskian
Server operating system version
Ubuntu 22.04
Plesk version and microupdate number
v18.0.58_build1800240123.15
From what I know, both Dovecot and Postfix allow for UTF-8 characters in the local part of an email address, the part that comes before the @.
However, in Plesk I can't set up an email address like e.g. E=mc2@einste.in or even just with a German umlaut, like mötör@he.ad

Is there a way to circumvent this and add these names directly to Dovecot and Postfix e.g. as an alias, using a sanitized version for Plesk?

PS I searched the forum and this question was already asked 2007 (in a different form), but received no answer.
 
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