[postfix-es] virus_scan_failed

[Oscar m Cruz]

Hola lista

ultimamente tengo un problema con el server despues de 2 semanas de pasar
corriendo sin ningun problema, supongo que puede ser el equipo ya q lo tengo
sobre una pc de escritorio en la cual tengo mail, web, ftp y otros
servicios, siempre que se da ese problema tengo que reiniciar el server y
despues corre sin ningun problema

Existe alguna solucion rapida o es error de configuracion ?

les agradesco desde ya sus ayudas

aqui el log


F003D25C001     2057 Fri Aug 21 16:10:58  user en domain.com
(host 127.0.0.1[127.0.0.1] said: 451-4.5.0 Error in processing, id=08510-11,
virus_scan FAILED: virus_scan: ALL VIRUS SCANNERS FAILED: ClamAV-clamd
av-scanner FAILED: CODE(0x816e564) Too many retries to talk to
127.0.0.1:3310 (Can't connect to INET socket 127.0.0.1:3310: Connection
refused) at (eval 69) line 310. at (eval 69) line 511.; Avira AntiVir
av-scanner FAILED: /usr/sbin/antivir unexpected exit 200, output="error (not
enough memory available):  451-4.5.0  451-4.5.0 AntiVir / Linux Version
2.1.10-15 451-4.5.0 Copyright (c) 2007 by Avira GmbH. 451-4.5.0 All rights
reserved. 451 4.5.0 " at (eval 69) line 511.; ClamAV-clamscan av-scanner
FAILED: /usr/bin/clamscan run_command (open pipe): Can't fork at
/usr/lib/perl5/5.8.8/i586-linux-thread-multi/IO/File.pm line 192. at
/usr/sbin/amavisd line 2565. at (eval 69) line 511. (in reply to end of DATA
command))
                                         user en domain.com



646DE25C002   216850 Fri Aug 21 16:12:36  user en domain.com
(host 127.0.0.1[127.0.0.1] said: 451-4.5.0 Error in processing, id=09817-05,
virus_scan FAILED: virus_scan: ALL VIRUS SCANNERS FAILED: ClamAV-clamd
av-scanner FAILED: CODE(0x816e564) Too many retries to talk to
127.0.0.1:3310 (Can't connect to INET socket 127.0.0.1:3310: Connection
refused) at (eval 69) line 310. at (eval 69) line 511.; Avira AntiVir
av-scanner FAILED: /usr/sbin/antivir run_command (open pipe): Can't fork at
/usr/lib/perl5/5.8.8/i586-linux-thread-multi/IO/File.pm line 192. at
/usr/sbin/amavisd line 2565. at (eval 69) lin 451 4.5.0 e 511.;
ClamAV-clamscan av-scanner FAILED: /usr/bin/clamscan run_command (open
pipe): Can't fork at /usr/lib/perl5/5.8.8/i586-linux-thread-multi/IO/File.pm
line 192. at /usr/sbin/amavisd line 2565. at (eval 69) line 511. (in reply
to end of DATA command))
                                         user en domain.com
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