Just Use Email – How to Use Email for Everything

Re:Just Use Email – How to Use Email for Everything by edoceo on Tuesday May 11, 2021 @06:41PM (#27124515)

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.

[ Parent | on HN ]

Re:Just Use Email – How to Use Email for Everything by throwawayboise on Tuesday May 11, 2021 @06:55PM (#27124653)

As 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.

[ Parent | on HN ]

Re:Just Use Email – How to Use Email for Everything by megous on Tuesday May 11, 2021 @08:15PM (#27125214)

Why 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.

[ Parent | on HN ]

Re:Just Use Email – How to Use Email for Everything by habibur on Wednesday May 12, 2021 @04:59AM (#27128223)

SPF 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.

[ Parent | on HN ]

Re:Just Use Email – How to Use Email for Everything by megous on Wednesday May 12, 2021 @11:49AM (#27131702)

dkim=pass is on 5k spam messages, missing dkim is on 95% of HAM email I receive. So that's a no go and not a great signal anyway.

[ Parent | on HN ]

Re:Just Use Email – How to Use Email for Everything by account42 on Wednesday May 12, 2021 @08:08AM (#27129341)

> 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.

[ Parent | on HN ]

Re:Just Use Email – How to Use Email for Everything by edoceo on Tuesday May 11, 2021 @07:22PM (#27124862)

I 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.

[ Parent | on HN ]

Re:Just Use Email – How to Use Email for Everything by sbuk on Wednesday May 12, 2021 @02:19AM (#27127254)

SPF, DKIM and DMARC are more about anti spoofing than spam prevention.

[ Parent | on HN ]