I know this is an arguable scenario, but I am sick of the spam getting through that is <may be forged>. It seems like spammers are figuring ways to forge and get around blocks. I have recently found IP addresses that I force blocked, skating through on a <may be forged>. I read where some settings can be added to fail2ban that will reject these emails. I tried adding them and it did not help. I was also reading that Sendmail 8.4 has the feature "FEATURE(`require_rdns')dnl", than can be enable or disabled. My question is how do I turn on and off this feature? I looked in sendmail.mc and "FEATURE(`require_rdns')dnl" does not exist. Thanks Tom
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