On Sat, 12 Mar 2011 08:16:19 EST, William Herrin said: > Anyone have a list of MUAs that actually support RFC 2369 with > subscription management widgets in the GUI? Surely someone has written > one but I can't seem to find any documentation to that effect.
EXMH had that support long ago:
cvs repository 4/9/1999
Support for RFC2369. If a message contains RFC2369 compliant
headers, a "List..." menu will appear with List related items
on it. [ Note that this makes visible a mailto url related
bug which you'll find described in exmh.BUGS ] -cwg
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