To hook Mailcrypt into VM, use the following lines:
(add-hook 'vm-mode-hook 'mc-install-read-mode) (add-hook 'vm-summary-mode-hook 'mc-install-read-mode) (add-hook 'vm-virtual-mode-hook 'mc-install-read-mode) (add-hook 'vm-mail-mode-hook 'mc-install-write-mode)