On 12.9.2011, at 21.10, Lauro C. wrote:

Is it possible to have custom error messages? I want to translate some of the messages (for instance mailbox full), so it can be more user friendly. I already use the quota warning feature. But I need to translate the messages anyways, is it possible?

For "mailbox full", yes: http://wiki2.dovecot.org/Quota/Configuration#Custom_Quota_Exceeded_Message

Anything else: no. Do you have specific examples of anything else you'd want to change?