Hi, I change this

auth default { mechanisms = plain passdb pam { args = "dovecot" } passdb passwd { } userdb passwd { } But i have the same error :

telnet localhost 110 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. +OK Dovecot ready. 1 login toto mypasswd -ERR Unknown command.

telnet localhost 143 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'.

• OK Dovecot ready. 1 login toto mypasswd 1 OK Logged in

In pam.d/dovecot, i have auth required pam_unix.so nullok account required pam_unix.so

In pam.d/imap, i have auth required pam_nologin.so auth required pam_stack.so service=system-auth account required pam_stack.so service=system-auth session required pam_stack.so service=system-auth

In pam.d/pop3, i have auth required pam_nologin.so auth include pam_stack.so service=system-auth account include pam_stack.so service=system-auth session include pam_stack.so service=system-auth

and in pam.d/pop, i have auth required pam_nologin.so auth include system-auth account include system-auth session include system-auth

I don't know of pam