Hi, I'm trying to use imapsync to migrate my accounts and mailbox (mbox) of an server A (Postfix + Dovecot) to a Server B (Zimbra), without having to change user passwords on the server A, using a master user account. I'm using this paper http://wiki2.dovecot.org/Authentication/MasterUsers as guidance. The Dovecot server A, is not letting me authenticate. Follow the testing and debug below: Testing: # telnet <ip_address> 8143 Trying <ip_address>... Connected to <ip_address>. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN] Dovecot ready. a login mailadm*masteruser masterpass a NO [AUTHENTICATIONFAILED] Authentication failed. b logout * BYE Logging out b OK Logout completed. Connection closed by foreign host. Debug: /var/log/maillog: Aug 28 10:29:51 centosVM dovecot: master: Dovecot v2.0.9 starting up (core dumps disabled) Aug 28 10:30:02 centosVM dovecot: auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth Aug 28 10:30:02 centosVM dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so Aug 28 10:30:02 centosVM dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so Aug 28 10:30:02 centosVM dovecot: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so Aug 28 10:30:02 centosVM dovecot: auth: Debug: passwd-file /etc/dovecot/passwd.masterusers: Read 1 users Aug 28 10:30:02 centosVM dovecot: auth: Debug: auth client connected (pid=4693) Aug 28 10:30:27 centosVM dovecot: auth: Debug: client in: AUTH#0111#011PLAIN#011service=imap#011lip=10.0.2.15#011rip=10.0.2.2#011lport=143#011rport=59847#011resp=<hidden> Aug 28 10:30:27 centosVM dovecot: auth: Debug: auth(masteruser,10.0.2.2,master): Master user lookup for login: mailadm Aug 28 10:30:27 centosVM dovecot: auth: Debug: passwd-file(masteruser,10.0.2.2,master): lookup: user=masteruser file=/etc/dovecot/passwd.masterusers Aug 28 10:30:27 centosVM dovecot: auth: passwd-file(masteruser,10.0.2.2,master): unknown user Aug 28 10:30:29 centosVM dovecot: auth: Debug: client out: FAIL#0111#011user=masteruser What can be happening? Thanks, Cl?vis -- Clovis Tristao - UNICAMP/Faculdade de Engenharia Agricola Administrador de Redes - Secao de Informatica (SINFO) E-mail: clovis at feagri.unicamp.br http://www.feagri.unicamp.br MSN: clovis_tristao33 at hotmail.com Fone: 55(19) 35211031-35211038-35211047-91173116