I've had a similar problem that I haven't been able to resolve yet.
I downgraded to dovecot 1.0.0 (from atrpms) and all is well.
I think that the authentication methods are changing and I was
planning some research tomorrow.
Hope this helps.
It does. I was just thinking of trying that so I'll give it a shot
and see what happens. I do wish yum had a facility for >downgrading versions.
I just did a search on atrpms stable for dovecot and it's no longer
there. There is a dovecot-sieve rpm. I had to downgrade all >the way back to 0.99.11-8.EL4 from the base repo to get things working again.
I have rpms for 1.0.0 / Centos4 stored here - which I can make available to you if you need?
Although I see Axelis going to produce a fix very soon now so maybe you won't need them.
Let me know
Daveh