Hi,
I just wondering is there any way in postfix that can check port 25 of sender is open or not. Commonly I got spam where the sender IP address are not open for port 25 such as : Oct 6 20:47:06 smtp2 postfix/smtpd[58410]: 8F625267977: client=unknown[190.26.129.204] Oct 6 20:47:09 smtp2 postfix/cleanup[58769]: 8F625267977: message-id=<[EMAIL PROTECTED]> Oct 6 20:47:09 smtp2 postfix/qmgr[941]: 8F625267977: from=<[EMAIL PROTECTED]>, size=2732, nrcpt=1 (queue active) Oct 7 02:23:07 smtp2 postfix/smtpd[62042]: 448C1267935: client=mail1005.centrum.cz[90.183.38.135] Oct 7 02:23:08 smtp2 postfix/cleanup[62044]: 448C1267935: message-id=<[EMAIL PROTECTED]> Oct 7 02:23:08 smtp2 postfix/qmgr[60036]: 448C1267935: from=<[EMAIL PROTECTED]>, size=1352, nrcpt=1 (queue active) I want to make policy If source IP 190.26.129.204 and 90.183.38.135 with port 25 is not open then postfix will reject the email. Can any one help me how to set it up on postfix please? Because the domain is valid, also sender address also valid so I just want to make policy to fight this spam. Thank you all
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