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