On 13.4.2012, at 18.01, Frank Bonnet wrote: > Maybe it's a coincidence but it "seems" > since I upgrade from 2.0.18 to 2.1.3 > that some French characters ( a with accents by example ) > are not well displayed anymore using thunderbird and are > replaced by a "?" character
Dovecot doesn't send decoded characters to IMAP clients. Of course there might be something else going on, but I can't really guess what it could be.