Antispam Software

There are many ways to approach and undesired email filtering is to use black listings, known as RBL (Realtime Blackhole List). It's maintained by system administrators who, using various spam detection tools, report bad-behaving IP addresses (e.g. open relays or hosts that were detected to spend undesired email, have no registered DNS record, etc.). This information goes into a central database, and is then shared by those who want to use it. So rather than trying to filter each email separately, here all email coming from a blacklisted IP is rejected as soon as the connection is established. I understood that there must be some Antispam software to protect my drive. Even, there are many RBLs available. Some are more aggressive (blocking whole net blocks), whereas others are more flexible. One way to deal with false-positives here is to try to query several RBLs and then make a decision based on whether they all agree or not. Most RBLs are free for moderate usage, however if you issue too many queries in a short period of time you may get throttled by the service provider. If you pay them, they will provide you an unlimited access. So, never take chance. check for spams and make your waay to protect them.