How to cleaning up SENDMAIL spool

Cleaning the Mail Spool
There could be a lot of “trash” qf or df files left behind following a bout of misbehaving sendmails. If the size of either file is 0, you should be able to trash them safely.
cd /var/spool/mqueue-fixme
to get into your queue directory, and

IE ignores custom error pages

if you use php to create custom error pages (such as header(’HTTP/1.1 500 Internal Server Error’);) Internet Explorer ignores you custom page unless it is at least 512 (or sometimes 1024 bytes)
IE ignores custom error pages that are less than 512 (or from what i’ve read 1024) bytes.
just place this before any [...]