DDoS stands for "Distributed Denial of Service".
It is a criminal act that attempts to make a web site or other internet service unavilable by directing so much traffic at it that legitimate traffic has trouble getting through, resulting in a slow or inaccessible service.
All our servers are protected against DDoS attacks of all sizes, so you don't have to worry about a DDoS attack against you or another customer impacting your site.
Also ReadPHP mail() function disabled on Islandhosting.com
Creating an Email Account
Using php.ini directives on islandhosting.com
What do the server names like "pender" and "thetis" mean?
Increasing, or decreasing your upload_max_filesize in php settings.