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I just switched my long running SMTP to a new IP. I've got SPF, DKIM and DMARC all dialed in. I'm not getting tagged as spam. Even when I add new domains to thi
by edoceo 5y ago
I just switched my long running SMTP to a new IP. I've got SPF, DKIM and DMARC all dialed in. I'm not getting tagged as spam. Even when I add new domains to this host for sending - still gets through to G, Y and MS based services.
- throwawayboise 5y agoAs SPF, DKIM and DMARC have become more widely implemented, is IP reputation less of a factor than it used to be in spam detection algorithms? This is just my speculation, but it seems plausible.
- edoceo 5y agoI don't know. But a) I'm low volume and no list services and b) I checked my IPs against the BL before setting up the VMs. I still believe the terror-tales of trying to get an IP off them. My own spam filters still use them.
- megous 5y agoWhy would it be less of a factor? These things don't prevent spam. I can create a proper mail server with all these and send billion messages from it wherever I like. These technologies prevent various kinds of forgeries. Quick look at my archive, of 37k spams only 7k fails SPF. (I accept all email no matter what.) So it's some signal, but not nearly enough.
- habibur 5y agoSPF will pass if there is no SPF record in the domain. Which most probably is the case for most. Look for DKIM. Either it's signed and pass. Or spam if DKIM is missing. You can filter a lot more this way.
- account42 5y ago> These technologies prevent various kinds of forgeries. Preventing forgeries is what allows the trust to be based on the domain/address rather than the IP.
- sbuk 5y agoSPF, DKIM and DMARC are more about anti spoofing than spam prevention.