best spam filter for

Best Spam Filter For

This is the best option if you have a limited budget.
Although not illegal, and may in theory work, this common type of spam is always a bad opportunity at best and a fraud at work.
Since the MDA can't "reject" the mail since it's already been accepted by the MX, the best it can do is to send a bounce message back to the return-path address indicating that the mail is undeliverable.
The best that such filters can do is simply to segregate spam from wanted mail.
Some of the best methods employed by individuals and businesses have not been enough to stop the most determined of spammers.
Instead, best practice would be to query one or more dnsbl and using the response as a weighting term in the isps own spam-filtering system.
The best and most annoying example are those suggesting that for every person you send the letter to, some amount of money will be donated to a children's hospital or to some research company.
In the absence of any strong regulatory programs by the government, internet users are left trying to find the best filtering software they can to try to stop the spam before it reaches their inboxes.
Fortunately, many esps learned that it was not in their best interests to spam.
The best practice is for the mail system administrator to program his mxs to reject the mail at the time of the delivery attempt, rather than to pass it on to an mda to be bounced.