27May/100
Whitelist SMTP Authorized users
Common setup used at many mailservers is postfix with amavis. It is possible to be less restrictive to emails sent by our clients using our server without turning off antispam itself for sent emails.
10May/100
Tweak the readahead of a raid in linux
If your dealing with big RAID arrays with a linux 2.6 kernel you will need to tweak your block device readahead settings. This can double or triple your read speeds. The tweak is very easy.