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Advice re antispam functionality of IMF re use of RBL's

Posted on 2006-11-20
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Last Modified: 2012-05-05
Hello there. Using IMF and trying to halt spam.

Can I enable use of (multiple?) RBL servers to try and halt the flood of spam? Would appreciate quick direction on where to do this if it's possible?

Does anybody have any opinions on use of RBL's - all I know is I must avoid false positives in case a false + is an important business email!
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Question by:MPSmith4258
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by:Sembee
ID: 17979643
If you want to avoid false positives, don't use RBLs. By using an RBL you are allowing someone else to decide what email you can receive and there is very little you can do about stopping them from blocking an email until the recipient contacts you. Fine for regular email senders, but if you receive emails from new customers all the time, can you afford to block those messages?

The most effective primary tactic I have been using is greylisting. There are various tools that can do that, including GFI Mail Essentials and Vamsoft ORF. Vamsoft was built to use RBLs primarily, but I use it for greylisting alone and it is very effective.
I have written about greylisting on my blog: http://www.sembee.co.uk/archive/2006/09/18/24.aspx

You will never stop all spam, any application that claims it will is lying. It is a matter of getting it down to measurable levels.

Simon.
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by:MPSmith4258
ID: 17986502
Dear Simon,

Thanks for that. I guess your saying that something like VAMSOFT ORF and IMF together works very well?

Also, have you looked at this?

http://www.grynx.com/projects/greylist/

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Sembee earned 250 total points
ID: 17990585
A couple of people have pointed me in the direction of that Grynx Project and it is on my list of things to look at... the list is currently about 50 items and I am very business professional... too many things on the go, not enough time.

I have Vamsoft with IMF behind and I see two or three spam messages a week get to my inbox. IMF is set to filter only, it doesn't delete anything and I flush it out once a week or so and it has at most two dozen email messages.

Simon.
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by:MPSmith4258
ID: 17990742
Thanks Sembee
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