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Wonder how it works for you... I've been running my own mail infrastructure for 10+ years. hosting tens of domains with hundreds of thousands of messages daily.
by jesterson 5y ago
Wonder how it works for you... I've been running my own mail infrastructure for 10+ years. hosting tens of domains with hundreds of thousands of messages daily.
That's said, most of my spam senders match SPF and have proper DKIM records. Only few absolutely outrageous spammers ignore it.
Setting DKIM and SPF is not a rocket science and I'd be extremely surprised if spammers wouldn't do that.
- znpy 5y agoUh ... Your dkim settings are for your recipients to validate your emails. You should ALSO be checking dkim signatures on incoming e-mails (opendkim does that IIRC). Also, I forgot to mention that I REQUIRE tls for incoming smtp connection. That's another thing rising the bar for spammers. If you're using postfix, it's very open by default, in the sense that it doest not come with spf and/or dkim/dmarc tooling and it's not going to, for example, require (or even allow) ssl/tls for incoming smtp connections (and won't use it for outgoing smtp connection). One last thing: a little bit of spam leaks trough... But it's like less than a single spam email per two weeks.
- jesterson 5y ago> I forgot to mention that I REQUIRE tls for incoming smtp connection This would cut quite a number of legitimate emails for me. Surprised it works for you.