Some prblem with interface

in
"Virtualmin"->"Server Configuration"->"Spam and Virus Delivery"

"Destination for spam emails" or "Destination for virus emails"

This two options can be set in "Write to standard spam file ~/mail/*****" or "Write to standard spam Maildir ~/Maildir/.*****/" but in my system instaled dovecot and he store the mail in "~/.Maildir/".

Can this option to tell right change automaticall. Because we tell all users, who don't want to recieve spam, to select "Write to mail file under home directory" and "./.maildir/.spam"