Customizing Forwarding
Customizing Sending
Customizing Old Drafts
The variable mh-redist-full-contents must be set to non-nil if
dist requires the whole letter for redistribution, which is the
case if send is compiled with the BERK [1] option (which many people abhor). If you find
that MH will not allow you to redistribute a message that has been
redistributed before, this variable should be set to nil.
[1] To see which options your copy of MH was compiled with, use M-x mh-version (Miscellaneous).