apt won't put config files back

[aces and eights <mick.crane@gmail.com>]

hello,

after failing to get my roundcube dovecot installations to work again, as a last resort I apt removed dovecot and also /etc/dovecot.

Thinking "that's OK apt will put them back."

except

"Not replacing deleted config file /etc/dovecot/conf.d/20-managesieve.conf"

for all the conf files which is not very helpful.

Is there a way to persuade apt to put the config files back ?

mick