[CentOS] Sendmail timout errors

Sat Jan 26 20:53:06 UTC 2008
Denis Croombs <denis at croombs.org>

I have 2 Centos servers that are currently giving me grief, 

I am getting the error:-

SYSERR(root): timeout writing message to mail.server.co.uk

Resource temporarily unavailable

This is on both servers 

1 is Centos 4.x & the second is:-
sendmail-8.12.11-4.RHEL3.6
sendmail-cf-8.12.11-4.RHEL3.6
sendmail-devel-8.12.11-4.RHEL3.6

Any clues ?

Thanks

Denis

No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.516 / Virus Database: 269.19.11/1244 - Release Date: 25/01/2008
19:44