Hi,

I'm trying to implement a second dovecot server on a second machine to try to load balance IMAP/POP3 services. The first machine is already running and is working pretty well with dovecot-pop3d 1:1.0.15-2.3+lenny1. The new machine is running dovecot-pop3d 1:1.2.15-7 and accessing the existing maildirs over a NFS share on /mnt/mail.

When I try to telnet localhost 110 on the new machine it just freezes after the "pass MySecret", like this:

telnet localhost 110

Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. +OK Bem Vindo. user my.user@mydomain.com.br +OK pass MySecret ... (Nothing else happens)

If I try to stop Dovecot with /etc/init.d/dovecot stop it stops, but the pop3 process keep running and the only way to stop it is with kill -9.

On my log I only can see this: Aug 27 15:03:40 radamante dovecot: auth(default): client in: AUTH#0112#011PLAIN#011service=pop3#011secured#011lip=127.0.0.1#011rip=127.0.0.1#011lport=110#011rport=60421#011resp=<hidden> Aug 27 15:03:40 radamante dovecot: auth-worker(default): pam(my.user@mydomain.com.br,127.0.0.1): lookup service=dovecot Aug 27 15:03:40 radamante dovecot: auth-worker(default): pam(my.user@mydomain.com.br,127.0.0.1): #1/1 style=1 msg=Password: Aug 27 15:03:42 radamante dovecot: auth-worker(default): pam(my.user@mydomain.com.br,127.0.0.1): pam_authenticate() failed: Authentication failure (password mismatch?) Aug 27 15:03:42 radamante dovecot: auth(default): cache(my.user@mydomain.com.br,127.0.0.1): miss Aug 27 15:03:42 radamante dovecot: auth(default): ldap(my.user@mydomain.com.br,127.0.0.1): pass search: base=ou=Users, dc=mydomain, dc=com, dc=br scope=subtree filter=(&(mail=my.user@mydomain.com.br)) fields=mail,userPassword Aug 27 15:03:42 radamante dovecot: auth(default): ldap(my.user@mydomain.com.br,127.0.0.1): result: mail(user@domain)=my.user@mydomain.com.br userPassword(password)=<hidden> Aug 27 15:03:42 radamante dovecot: auth(default): client out: OK#0112#011user=my.user@mydomain.com.br#011user@domain=my.user@mydomain.com.br Aug 27 15:03:42 radamante dovecot: auth(default): master in: REQUEST#0111#01130330#0112 Aug 27 15:03:42 radamante dovecot: auth(default): passwd(my.user@mydomain.com.br,127.0.0.1): lookup Aug 27 15:03:42 radamante dovecot: auth(default): passwd(my.user@mydomain.com.br,127.0.0.1): unknown user Aug 27 15:03:42 radamante dovecot: auth(default): ldap(my.user@mydomain.com.br,127.0.0.1): user search: base=ou=Users, dc=mydomain, dc=com, dc=br scope=subtree filter=(&(mail=my.user@mydomain.com.br)) fields=homeDirectory,uidNumber,gidNumber Aug 27 15:03:42 radamante dovecot: auth(default): ldap(my.user@mydomain.com.br,127.0.0.1): result: uidNumber(uidNumber)=3478 gidNumber(gidNumber)=513 homeDirectory(homeDirectory)=/home/samba/my.user Aug 27 15:03:42 radamante dovecot: auth(default): master out: USER#0111#011my.user@mydomain.com.br#011uidNumber=3478#011gidNumber=513#011homeDirectory=/home/samba/my.user Aug 27 15:03:42 radamante dovecot: pop3-login: Login: user=<my.user@mydomain.com.br>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured Aug 27 15:03:42 radamante dovecot: auth(default): new auth connection: pid=30330 Aug 27 15:03:42 radamante dovecot: POP3(my.user@mydomain.com.br): Effective uid=8, gid=8, home=(none) Aug 27 15:03:42 radamante dovecot: POP3(my.user@mydomain.com.br): maildir: data=/mnt/mail/mydomain.com.br/my.user/Maildir Aug 27 15:03:42 radamante dovecot: POP3(my.user@mydomain.com.br): maildir++: root=/mnt/mail/mydomain.com.br/my.user/Maildir, index=, control=, inbox=/mnt/mail/mydomain.com.br/my.user/Maildir Aug 27 15:03:42 radamante dovecot: POP3(my.user@mydomain.com.br): Namespace : Using permissions from /mnt/mail/mydomain.com.br/my.user/Maildir: mode=0700 gid=-1

By now I have no clue whats going on, any help is appreciated. I don't understand if the problem is the NFS share or if it's something with the new version of Dovecot on Debian.

Some more info:

dovecot -n

1.2.15: /etc/dovecot/dovecot.conf

OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.2 nfs

log_timestamp: %Y-%m-%d %H:%M:%S protocols: imap pop3 ssl: no disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable(default): /usr/lib/dovecot/imap-login login_executable(imap): /usr/lib/dovecot/imap-login login_executable(pop3): /usr/lib/dovecot/pop3-login login_greeting: Bem Vindo. login_process_per_connection: no login_chroot: no login_process_size: 128 login_processes_count: 8 max_mail_processes: 2048 mail_max_userip_connections(default): 100 mail_max_userip_connections(imap): 100 mail_max_userip_connections(pop3): 10 verbose_proctitle: yes first_valid_uid: 1 last_valid_uid: 9999 last_valid_gid: 9999 mail_privileged_group: mail mail_uid: mail mail_gid: mail mail_location: maildir:/mnt/mail/%Ld/%Ln/Maildir mail_debug: yes mmap_disable: yes mail_nfs_storage: yes mail_nfs_index: yes maildir_copy_preserve_filename: yes mbox_write_locks: fcntl dotlock mail_executable(default): /usr/lib/dovecot/imap mail_executable(imap): /usr/lib/dovecot/imap mail_executable(pop3): /usr/lib/dovecot/pop3 mail_process_size: 512 mail_plugin_dir(default): /usr/lib/dovecot/modules/imap mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3 imap_client_workarounds(default): delay-newmail imap_client_workarounds(imap): delay-newmail imap_client_workarounds(pop3): imap_idle_notify_interval(default): 30 imap_idle_notify_interval(imap): 30 imap_idle_notify_interval(pop3): 120 pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh auth default: default_realm: mydomain.com.br cache_size: 1024 cache_negative_ttl: 0 username_format: %Lu failure_delay: 3 debug: yes passdb: driver: pam passdb: driver: ldap args: /etc/dovecot/dovecot-ldap.conf userdb: driver: passwd userdb: driver: ldap args: /etc/dovecot/dovecot-ldap.conf

root@radamante:/etc/dovecot# egrep -v '^#|^$' dovecot-ldap.conf hosts = 192.168.5.37 192.168.5.124 sasl_bind = no tls = no auth_bind = no ldap_version = 3 base = ou=Users, dc=mydomain, dc=com, dc=br deref = never scope = subtree user_attrs = homeDirectory=homeDirectory,uidNumber=uidNumber,gidNumber=gidNumber user_filter = (&(mail=%u)) pass_attrs = mail=user@domain,userPassword=password pass_filter = (&(mail=%u)) default_pass_scheme = CRYPT

Thanks in advance.