My configuration file have this lines:

# doveconf | grep user

auth_anonymous_username = anonymous auth_master_user_separator = auth_socket_path = auth-userdb auth_ssl_username_from_cert = no auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@ auth_username_format = %Lu <-----(in version 1.2.10 this work fine) auth_username_translation = default_internal_user = dovecot default_login_user = dovenull director_user_expire = 15 mins login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c mail_max_userip_connections = 10

in this new version, my user authentication fails:

Debug: shadow(wperez@mydomain,1.2.3.4): lookup Info: shadow(wperez@mydomain,1.2.3.4): unknown user auth: Debug: client out: FAIL 2 user=wperez@mydomain

in my server only exists the user wperez, but dovecot uses the user "wperez@mydomain"

in this new version auth format changes?

Thank you.