RIM Using IP Address Scoring to Block BIS Spam
A little over a year ago there was a huge spam email problem for all BIS email users. Spammers found a way to wildcard BIS email addresses to send you nonsense spam. After a few months RIM finally managed to get it under control but never announced how they were blocking spam on the BlackBerry BIS addresses. I always thought this would be a big problem for them since there is no spam box for them to send potential spam emails into. That means if they blocked a message you would never know it was ever sent to you…
In the recent BIS 2.8 documentation RIM details a little about their spam filter and this has to be the most I have ever heard them say about it.
The anti-spam system for the BlackBerry Internet Service uses a reputation scoring system for IP addresses to evaluate the relative reputation of IP addresses of incoming email messages. If the anti-spam system determines that the email message is a spam email message, the anti-spam system blocks the email message before it can reach BlackBerry Internet Service subscribers. For additional control of spam email messages, subscribers can create email message filters to file unwanted email messages or to prevent email messages from being delivered to their BlackBerry device.
Now I am curious. Has anybody ever not gotten a valid email due to RIM’s spam filter? I have never noticed any…
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