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I have greylisting enabled for years. But recently some Russian spamers were able to circumvent those by using compliant SMTP servers. They even support proper
by PinguTS 4y ago
I have greylisting enabled for years. But recently some Russian spamers were able to circumvent those by using compliant SMTP servers. They even support proper SPF, DKIM, DMARC and all that stuff what you can think of.
That is the reason why I switched on some external block lists into the mix.
- unilynx 4y agoI wonder if anyone compared the effectiveness of postscreen vs greylisting. Can't find any Both rely on filtering out non compliant senders, but postscreen's filtering might be less disruptive. Are there spammers out there who cannot pass a graylist but can pass postscreen ?