> > Is it possible to achieve similar failover using pgsql backend? > > It would require writing code to support that, but I'm not going to get > around to it anytime soon. The MySQL-specific connection pooling code > should probably be moved to generic code that works with all SQL > backends.
Yeah, with generic pooling code, it'll definitely increase dovecot's availability for more situation. Thanks for your nice work! Regards, Frank Wang