[Dovecot] A message, when moved by multiple clients with same account and same filters, can be duplicated by filters on destination imap folder.

[Diego Liziero]

I'm still collecting user feedback after moving from uw-imap to
dovecot development release 1.1.rc3.

What said in the subject seems the obvious result of an improper configuration.
Office emails are configured and accessed on multiple clients with the
same automatic filters, and sometimes the filtered emails get
duplicated on the destination folder.

The fact is that this was perfectly working with wu-imap (without any
duplication/triplication of emails).

I'm looking if there is some workaround to keep this client misuse
working with dovecot.

Could an email have a sort of "primary key" that forbids it's
duplication in the same imap folder?

Regards,
Diego.