[Mailman-Users] sync_members - doesnt sync E-mail addresses with german umlauts characters (in the domain)

[Dlugasny]

Hi,
sync_members command is not able to sync E-mail addresses with german Umlauts.

[ä, ö,](https://learn-german-easily.com/german-umlauts)

I saw some rules for an valid E-mail domain in .../Mailman/Utils.py
This kind of characters are allowed in the domain names, but mailman accepting only a-z 0-9. Is it possible to change it ?
Greetz
Dlugasny

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