Reading through that Wikipedia article did highlight one benefit to using greylisting even after the spammers account for it; it would delay the spam and give time for the other anti-spam measures to detect it (the source and the actual text) as spam.
Unfortunately, greylisting does have several disadvantages:
1) Misconfigured mail servers attempting to send mail to a server utilizing greylisting may translate the temporary reject as a permanent reject. 2) Domains that have a large enough cluster of relay servers may attempt to send the email using different servers, eventually causing an undeliverable bounce of legitimate email. 3) The delay (up to four hours for most email servers) may be undesirable in certain situations, such as a customer-support address for a company, where response time would be important. Fortunately, at least postgrey gives a method of excluding some recipients from the greylist; emails for those addresses will go through immediately.
And implemented greylisting on it. Cut out almost %100 of the spam I have been receiving (Was up to 50 emails a day, now I think only one has gone through since I installed postgrey on my mail server in 1.5 months!). Unfortunately, this is easy to get around, so it should only be a matter of time till that is worked around and becomes useless in the spam fight. By that time, hopefully another anti-spam method comes up...
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Reading through that Wikipedia article did highlight one benefit to using greylisting even after the spammers account for it; it would delay the spam and give time for the other anti-spam measures to detect it (the source and the actual text) as spam.
Unfortunately, greylisting does have several disadvantages:
1) Misconfigured mail servers attempting to send mail to a server utilizing greylisting may translate the temporary reject as a permanent reject.
2) Domains that have a large enough cluster of relay servers may attempt to send the email using different servers, eventually causing an undeliverable bounce of legitimate email.
3) The delay (up to four hours for most email servers) may be undesirable in certain situations, such as a customer-support address for a company, where response time would be important. Fortunately, at least postgrey gives a method of excluding some recipients from the greylist; emails for those addresses will go through immediately.
And implemented greylisting on it. Cut out almost %100 of the spam I have been receiving (Was up to 50 emails a day, now I think only one has gone through since I installed postgrey on my mail server in 1.5 months!). Unfortunately, this is easy to get around, so it should only be a matter of time till that is worked around and becomes useless in the spam fight. By that time, hopefully another anti-spam method comes up...
Muntant sharks with Big Freakin' Laser Beams on their heads in Space? Nothing can possibly go wrong with that!
Exactl... Hey!
Cajun? Look about 100 miles west if you want Cajun cooking. That's more of Creole style food in the New Orleans area!
- Miffed Cajun