pb relation sympa/exim => loop

[adresse@cachée]

Bonjour, après reinstallation de sympa sur un nouveau serveur (debian woody), 
j'ai un probleme de loop. Il me semble qu'il s'agit d'un probleme de relation 
entre exim et sympa.
voici quelques morceaux de logs :

Log sympa : 

Sep 13 11:36:55 crmte sympa[25222]: 
DoFile(/adresse@cachée)
Sep 13 11:36:55 crmte sympa[25222]: Processing web message for 
adresse@cachée
Sep 13 11:36:55 crmte sympa[25222]: Message for adresse@cachée sent
Sep 13 11:37:25 crmte sympa[25222]: 
DoFile(/var/spool/sympa/queue/sympa.1031909843.25888)
Sep 13 11:37:25 crmte sympa[25222]: Ignoring message which would cause a 
loop, sent by adresse@cachée
Sep 13 11:37:25 crmte sympa[25222]: Moving bad file sympa.1031909843.25888 to 
bad/


Log exim :

2002-09-13 11:36:04 17pmrs-0006hU-00 <= adresse@cachée U=sympa 
P=local S=566
2002-09-13 11:36:04 17pmrs-0006hU-00 == adresse@cachée 
D=defer_director defer (-1): forced defer: All deliveries are deferred
2002-09-13 11:36:12 17pmrs-0006hU-00 => | /usr/lib/sympa/bin/queue essai2 
<adresse@cachée> D=system_aliases T=address_pipe
2002-09-13 11:36:12 17pmrs-0006hU-00 Completed
2002-09-13 11:36:15 17pms2-0006hq-00 <= adresse@cachée U=sympa 
P=local S=1291 adresse@cachée
2002-09-13 11:36:15 17pms2-0006hq-00 == adresse@cachée 
D=defer_director defer (-1): forced defer: All deliveries are deferred
2002-09-13 11:36:15 17pms2-0006hq-00 == adresse@cachée 
R=defer_router defer (-1): remote host address is the local host
2002-09-13 11:36:15 17pms2-0006hq-00 ** adresse@cachée: retry 
timeout exceeded
2002-09-13 11:36:15 17pms2-0006hq-00 ** adresse@cachée: retry 
timeout exceeded
2002-09-13 11:36:15 17pms3-0006hv-00 <= <> R=17pms2-0006hq-00 U=mail P=local 
S=2309
2002-09-13 11:36:15 17pms3-0006hv-00 == adresse@cachée 
D=defer_director defer (-1): forced defer: All deliveries are deferred
2002-09-13 11:36:15 17pms2-0006hq-00 Error message sent to 
adresse@cachée
2002-09-13 11:36:15 17pms2-0006hq-00 Completed


un message d'erreur d'exim :
2002-09-12 18:05:31 directing failed for .@crmte.univ-fcomte.fr 
<adresse@cachée>: unknown local-part "." in domain 
"crmte.univ-fcomte.fr"
2002-09-12 18:05:31 |"p=/usr/bin/procmail && test -f $p && exec $p -Yf- || 
exit 75 " <adresse@cachée> D=userforward T=address_pipe: 
"p=/usr/bin/procmail && test -f $p && exec $p -Yf- || exit 75 " command not 
found for address_pipe transport


des idées ?

Merci

Yann Delanoë