Hi all,
I recently started using greylisting for incoming mails. Great feature: spam dropped 99.9%!!
I've monitoring the greylist for some days now, and I suspect there may be a small problem with accepting regular mails that have been greylisted.
In my greylist, I see that a lot of mails (from legitimate senders) entering the greylist. As the sending server gets a "service not available" at that time, the mail is resend a few minutes later, but originating from an other ip adress (other outgoing mail server for that same domain). It seems that this second mail gets greylisted too, thus not confirming the first mail... (I have mails from a national ISP (telenet.be) that are listed 5 times, each with different IP adress)
Am I correct with this observation?
I recently started using greylisting for incoming mails. Great feature: spam dropped 99.9%!!
I've monitoring the greylist for some days now, and I suspect there may be a small problem with accepting regular mails that have been greylisted.
In my greylist, I see that a lot of mails (from legitimate senders) entering the greylist. As the sending server gets a "service not available" at that time, the mail is resend a few minutes later, but originating from an other ip adress (other outgoing mail server for that same domain). It seems that this second mail gets greylisted too, thus not confirming the first mail... (I have mails from a national ISP (telenet.be) that are listed 5 times, each with different IP adress)
Am I correct with this observation?
