hi i installed dovcot about a year ago and now its not working well.
Task 'admin@*****.info - Sending' reported error (0x800CCC67) : ' The server responded: 421 Unexpected failure, please try later'
this is form outlook
Service not available, closing channel
Server replied: 421 Unexpected failure, please try later
this is from squirel mail.
i tried turneing off iptables and resterting the service and the server.
u get these errors in the exim log
and this is a snipet of my sys maillog
i have no idea how to fix this.

Task 'admin@*****.info - Sending' reported error (0x800CCC67) : ' The server responded: 421 Unexpected failure, please try later'
this is form outlook
Service not available, closing channel
Server replied: 421 Unexpected failure, please try later
this is from squirel mail.
i tried turneing off iptables and resterting the service and the server.
u get these errors in the exim log
Code:
2007-01-26 01:03:20 1HAFUr-0002k5-4J Failed to create spool file /var/spool/exim/input//1HAFUr-0002k5-4J-D: Permission denied
and this is a snipet of my sys maillog
Code:
Jan 26 00:17:17 server spamd[2773]: prefork: select returned error on server filehandle:
Jan 26 00:42:44 server spamd[8713]: prefork: sysread(7) failed after 300 secs at /usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/SpamdForkScaling.pm line 561.
Jan 26 00:44:26 server spamd[8714]: prefork: sysread(8) failed after 300 secs at /usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/SpamdForkScaling.pm line 561.
Jan 26 00:44:49 server spamd[2773]: Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/SpamdForkScaling.pm line 269.
Jan 26 00:49:23 server spamd[2773]: prefork: select returned error on server filehandle:
Jan 26 00:55:35 server spamd[2773]: prefork: child states: II
Jan 26 01:00:12 server spamd[2773]: prefork: child states: II
Jan 26 01:01:23 server spamd[2773]: prefork: cannot ping 8714, file handle not defined, child likely to still be processing SIGCHLD handler after killing itself
Jan 26 01:01:37 server spamd[2773]: prefork: killing failed child 8714 fd=undefined at /usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/SpamdForkScaling.pm line 137.
Jan 26 01:04:00 server spamd[2773]: spamd: handled cleanup of child pid 8714 due to SIGCHLD
Jan 26 01:23:40 server spamd[2773]: prefork: killed child 8714
Jan 26 01:50:08 server spamd[2773]: prefork: cannot ping 8713, file handle not defined, child likely to still be processing SIGCHLD handler after killing itself
Jan 26 02:26:50 server spamd[2773]: prefork: killing failed child 8713 fd=undefined at /usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/SpamdForkScaling.pm line 137.
Jan 26 03:47:40 server spamd[2773]: spamd: handled cleanup of child pid 8713 due to SIGCHLD
Jan 26 04:59:18 server spamd[2773]: prefork: killed child 8713
Jan 26 06:48:42 server spamd[2773]: spamd: server successfully spawned child process, pid 12403
Jan 26 09:30:53 server spamd[2773]: spamd: fork: Cannot allocate memory at /usr/bin/spamd line 834.
Jan 26 09:31:18 server spamd[12403]: prefork: sysread(7) failed after 300 secs at /usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/SpamdForkScaling.pm line 561.
Jan 26 14:04:38 server dovecot[2592]: Dovecot v1.0.rc15 starting up
i have no idea how to fix this.