On 8/6/17 2:34 PM, Dlugasny via Mailman-Users wrote:
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
The issue is likely due to the fact that the base protocol document for
SMTP only allows for 'ASCII' characters in email addresses (and to a
large extent anywhere in the headers of an email message). There are
extensions with varying degrees of acceptance that extend this character
set. (Note, I don't think SMTP needs to be 8 bit clean even for the
message body, which is why we still have things like BASE64 and
Quote-Printed encoding for messages).
A second part of the question is to what level does Python email
libraries support these extensions and how easy is it to figure out how
the local email system will handle messages that attempt to use them.
--
Richard Damon
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