Hello,
I'm using proxy_maybe and auth_default_realm. It seems that when a user logs in without the domain name, relying on auth_default_realm, and the "host" field points to the local server, I get the Proxying loops to itself error. It does work as expected - log on to the local server without proxying, if the user does include the domain name in the login.
(IP's and domain name masked below)
No domain:
Dec 29 11:49:07 imap01 dovecot: pop3-login: Error: Proxying loops to itself: user=<jedi@----.com>, method=PLAIN, rip=00.00.52.18, lip=00.00.241.140 Dec 29 11:49:27 imap01 dovecot: pop3-login: Disconnected (auth failed, 1 attempts): user=<jedi@----.com>, method=PLAIN, rip=00.00.52.18, lip=00.00.241.140
With domain:
Dec 29 11:52:13 imap01 dovecot: pop3-login: Login: user=<jedi@---.com>, method=PLAIN, rip=00.00.52.18, lip=00.00.241.140, mpid=19969 Dec 29 11:52:18 imap01 dovecot: pop3(jedi@---.com): Disconnected: Logged out top=0/0, retr=0/0, del=0/1, size=731
Otherwise, e.g. when the proxy host is indeed another host, auth_default_domain works fine, including or not including the domain seems to make no difference, and everything works.
I'm using mysql, and I'm able to get around this problem including the following in the password query: IF(host='' or host='00.00.241.140', NULL, 'Y') as proxy_maybe
# dovecot --version 2.0.15
# dovecot -n # 2.0.15: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.3 auth_default_realm = ----.com auth_mechanisms = plain login cram-md5 ntlm auth_username_format = %Lu auth_verbose = yes auth_verbose_passwords = plain dict { quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } disable_plaintext_auth = no login_greeting = How can I help you? mail_gid = vmail mail_uid = vmail passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocols = imap pop3 lmtp service lmtp { inet_listener lmtp { address = 0.0.0.0 port = 7025 } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_proctitle = yes
----- dovecot-sql.conf.ext ----
driver = mysql
connect = host=localhost dbname=email user=email
default_pass_scheme = PLAIN
password_query = SELECT password,
IF('%s' = 'pop3', host_pop3, host) as host,
IF(host='' or host='00.00.241.140', NULL, 'Y') as proxy_maybe,
concat(userid, '@', domain) as destuser,
password as pass,
'/stor/mail/domains/%d/%n' AS userdb_home,
'maildir:/stor/mail/domains/%d/%n/Maildir' as userdb_mail,
concat('*:storage=', quota_mb, 'M') as userdb_quota_rule,
'vmail' AS userdb_uid, 'vmail' AS userdb_gid
FROM email WHERE userid = '%n' AND domain = '%d'
user_query = SELECT '/stor/mail/domains/%d/%n' AS home,
'maildir:/stor/mail/domains/%d/%n/Maildir' as mail,
concat('*:storage=', quota_mb, 'M') as quota_rule,
'vmail' AS uid, 'vmail' AS gid
FROM email WHERE userid = '%n' AND domain = '%d'