home folder for virtual users with autoexpunge setting

Hi all,

I have enabled today the autoexpunge setting for Trash folders, and I am getting the following error when Dovecot starts:

imap(<USER>): Error: autoexpunge: Couldn't create dovecot.autoexpunge.lock lock: User has no home directory

I understand this is correct: as <USER> is a virtual user, it does not have home folder. Is there any way I can set the autoexpunge plugin to store the lock file in the virtual user email home folder?

Thank you! Felix