Email spam is, of course, a continuing problem, even if the total amount has fallen recently. So Google has responded by adding some new tools to Google Apps.
Administrators of domains that use Google Apps can now enable a technology known as DomainKeys Identified Mail (DKIM). This technology is intended to prevent “spoofing” of messages, the widely-used spam technique of sending emails with a bogus “from” address, or one that’s real, but not sent by that person. DKIM uses a pair of keys — one in the domain’s DNS records, and one in sent messages — supposed to prevent address spoofing.
This new option is added to SPF, another spam-fighting technology that Google Apps has supported for some time. And users of the paid Google Apps for Business suite can refine their spam filtering using Postini, which Google bought several years ago.
If these spam-fighting tools aren’t enough, Google has also announced that it’s now possible to entirely turn off the ability for some users to send or receive emails from outside one’s own domain. While this feature was originally intended for Google Apps for Education used in schools, it’s also available in the Business and Government editions.
I’m not sure how many businesses would find internal-only email addresses useful, since there are many other options for communicating privately within organizations. But internal email would have some similarities to the “not-really-email, only-receive-messages-from-your-friends” Facebook Messaging system.
How many spam messages are arriving in your inbox? What do you use to control spam?