Quoting Arkadiusz Miśkiewicz <ar...@maven.pl>:
Hi. I wonder if there any plans of finishing "multiple passwords for single user" feature? <snip> Untill that happens (not that great) workaround exists: http://wiki2.dovecot.org/Authentication/MultipleDatabases
No, just use multiple fields in SQL with IF statements. Unless you want a single login method to support multiple passwords - which doesn't seem like a good idea to me.