Pb postfix fetchmail vers exterieur

Bonjour,
j'ai parametrer un serveur postfix/fetchmail et dovecot pour réaliser un serveur de messageie sous linux debian.

Cependant, j'ai un probleme avec fetchmail:

fetchmail: WARNING: Running as root is discouraged.
gethostbyname failed for serveurmail
Name or service not knownCannot find my own host in hosts database to qualify it!
Trying to continue with unqualified hostname.
DO NOT report broken Received: headers, HELO/EHLO lines or similar problems!
DO repair your /etc/hosts, DNS, NIS or LDAP instead.
fetchmail: 6.3.9-rc2 querying pop3.altaconcept.com (protocol POP3) at Mon May 31 14:51:16 2010: poll started
Trying to connect to 213.246.52.34/110...connected.
fetchmail: POP3< +OK Hello there. <32013.1275309560@localhost.localdomain>
fetchmail: POP3> CAPA
fetchmail: POP3< +OK Here's what I can do:
fetchmail: POP3< STLS
fetchmail: POP3< TOP
fetchmail: POP3< USER
fetchmail: POP3< LOGIN-DELAY 10
fetchmail: POP3< PIPELINING
fetchmail: POP3< UIDL
fetchmail: POP3< IMPLEMENTATION Courier Mail Server
fetchmail: POP3< .
fetchmail: POP3> STLS
fetchmail: POP3< +OK Begin SSL/TLS negotiation now.
fetchmail: Issuer Organization: Courier Mail Server
fetchmail: Issuer CommonName: localhost
fetchmail: Server CommonName: localhost
fetchmail: Server CommonName mismatch: localhost != pop3.altaconcept.com
fetchmail: pop3.altaconcept.com key fingerprint: C6:9F:9B:E9:DD:F3:3C:BD:82:6C:A5:78:49:96:5C:11
fetchmail: Server certificate verification error: self signed certificate
fetchmail: Server certificate verification error: certificate has expired
fetchmail: POP3> CAPA
fetchmail: POP3< +OK Here's what I can do:
fetchmail: POP3< TOP
fetchmail: POP3< USER
fetchmail: POP3< LOGIN-DELAY 10
fetchmail: POP3< PIPELINING
fetchmail: POP3< UIDL
fetchmail: POP3< IMPLEMENTATION Courier Mail Server
fetchmail: POP3< .
fetchmail: pop3.altaconcept.com: upgrade to TLS succeeded.
fetchmail: POP3> USER htrignac
fetchmail: POP3< +OK Password required.
fetchmail: POP3> PASS *
fetchmail: POP3< -ERR Login failed.
fetchmail: Login failed.
fetchmail: Authorization failure on htrignac@pop3.altaconcept.com
fetchmail: POP3> QUIT
fetchmail: POP3< +OK Better luck next time.
fetchmail: 6.3.9-rc2 querying pop3.altaconcept.com (protocol POP3) at Mon May 31 14:51:22 2010: poll completed
fetchmail: Query status=3 (AUTHFAIL)
fetchmail: normal termination, status 3

.. checking failed!

D'autre patr, je ne peux ni recevoir ni envoyer d email vers l'exterieur et je ne peux pas parametrer de client thunderbird sous windows sur machine client car il n'arrive pas a se logger;

Avez vous des idées pour m'aider