Recently, I had the opportunity to try out managed spam filtering services that are designed to provide email security to small and medium business. After doing some research, I came across an “in the cloud” spam blocker service called “MX Police.” To filter spam “in the cloud” means to filter mail before it reaches your mail server. Filtering mail before it reaches your network enables you to drastically reduce the drain on your resources and increase the security of your network.
Installation of MX Police was painless. We provided MX Police with our domain name and current mail server, and MX Police set up our account right away. All that remained at that point was to cut over the DNS records, which allowed MX Police to filter our mail. The process for cutting over the DNS took less than five minutes, and our mail was filtered almost immediately.
Within the first 24 hours, I noticed a dramatic decrease in the amount of mail being passed on to our mail server. I do not have the exact numbers, but I would estimate we were using around half the bandwidth we used previously. This made sense, as about 85% of our mail is typically spam.
MX Police delivered a quarantine message to each user at 6pm on Monday through Friday. This message contained a list of emails currently in the spam quarantine for the day, with a one-click release to my Inbox. Not a single legitimate message was flagged as spam during our evaluation, so we never needed to release any messages from the quarantine.
Before using MX Police, I was averaging over 100 spam messages per day to my account. During the 38-day evaluation period, I received only 3 or 4 spam messages in total. I am impressed with that figure, especially considering no legitimate correspondence was tagged as spam.
Besides the five-minute set up, we did not have to perform any administration at all. There are no knobs or dials to tweak, and there was no hardware or software to manage. During the evaluation, all that was required was our domain name. Near the end of the evaluation, they requested a list of all email addresses in order to update the system and “lock” it down.
Exporting email addresses was quite easy with the MX Police Exchange export tool. We ran the command on our Exchange server, and they updated their database with the email addresses. From that point on, we just let them know when we needed a new email address added, and they updated their database accordingly.
After setting up the individual email addresses, they told us to lock our firewall to only accept mail from their networks. This is a great idea because it prevents spammers from attempting to bypass the security and send mail directly to our servers. Spammers will often cache DNS records for 30 days or more, so the sooner you import your email addresses, the better the system works.
If your business requires spam filtering, I give MX Police two thumbs UP!
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