I am interested to know how you find mutt restrictive.
It lacks format strings for fine grained header control, default output formats etc. See mh-format(5). More information can be found in the MH book. For me, these are what really make MH indispensable. That and the ability to read my mail over a 9600 baud ssh connection through my mobile phone (which admittedly, mutt should also be able to do).
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