[Dovecot] Migrate from Maildir to mdbox

[Ralf Hildebrandt]

> > And usually one uses "check_recipient_access" for this, not
> > header_checks
> 
> Aren't the smtp restrictions enforced before accepting the mail?

while, not before. They actually lead to mail being accepted or
rejected.

> How would one hold something he hasn't got yet? :)

See "man 5 access". 

       HOLD optional text...
       
                     Place the message on the hold queue, where it will
                     sit until someone either deletes it or releases it
                     for delivery. Log the optional text if specified,
                     otherwise log a generic message.
	      

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de