Benefits of Postini spam/virus
filtering vs. on-server filtering
Some hosting services are offering on-server spam
and virus filtering to their customers, either free
or at a low cost. While this might at first seem
like a great deal, you may wish to consider the following:
On-server-filtering (e.g. using GFI, "SpamAssassin",
ClamAV or other spam/virus software) is relatively inexpensive
for the hosting company, but has several drawbacks.
Firstly, it places an extra footprint on the
server and slows down or affects mailbox processing
(UNIX, Windows-based and Exchange mailservers can be
quite CPU intensive). Secondly, and more importantly,
on-server virus and spam systems are updated at the
most every 24 hours (if the system admin has set them
up correctly). This means that on the same day
that a virus is released, your emails will be vulnerable
for up to 24 hours.
Instead, with our Postini service, virus signatures
are updated directly from McAfee and/or other sources,
every 15 minutes! This means that your "zero day
vulnerability" is reduced from 24 hours to 15 minutes
at the most. Postini specializes in spam and virus
filtering; that's all they do. Their entire service
is dedicated to maintaining live, state of the art,
up-to-the-minute email filtering systems. Can
you afford to leave your email filtering up to a system
admin who's many priorities are other than spam/virus
filtering, and who may or may not have updated your
mailserver's filtering software that day and every day?
Postini's state of the art, peace-of-mind systems are
automatically updated every 15 minutes, every day, 24/7/365.