Дилян Палаузов writes:

Please trim, your questions below don't need the quoted material
above.

 > Should topics in the X-Topics

I just noticed this.  We probably shouldn't produce "X-", that usage
is deprecated.  We probably should accept it, however (Postel
Principle).  "Topic(s)" alone is too generic.  Since "List-" headers
are RFC- defined, that's probably not a good idea (unless other
implementations are very similar to Mailman 2's, or we're willing to
promise to adapt to best practice).  So I think "Mailman-Topics" which
indicates our implementation of topics is best.

Comments very welcome

 > Should topics in the X-Topics header be RFC2047 encoded?

Yes, but I don't promise the implementation will be robust.

 > It should be defined what characters can be / cannot be part of a
 > topic.

Per Mark's message, this is defined in Mailman 2.  We have to accept
whatever was acceptable in Mailman 2, since our target is people
upgrading from Mailman 2 who use topics.

I think spaces should be allowed in topics, but not commas.
Perhaps the semicolon would be a better separator going forward (as in
structured headers in general).

Steve

-- 
GNU Mailman consultant (installation, migration, customization)
Sirius Open Source    https://www.siriusopensource.com/
Software systems consulting in Europe, North America, and Japan
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