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I want to throw my hat in here because there are plenty of the "works for me" crowd. I've run a personal mail server for the last 5 or so years and I have SPF,

I want to throw my hat in here because there are plenty of the "works for me" crowd. I've run a personal mail server for the last 5 or so years and I have SPF, DKIM, DMARC setup correctly, get 10/10 for mail-tester.com and get graded "not spam" for all the other spam tester sites. Spam Assassin loves me and I have a .com mail server. I can land more or less into personal emails (occasionally I get filtered into spam), but when it comes to corporate emails I pretty much get /dev/nulled each time and can't even land into a spam folder. I can't give out my personal email as a point of contact and have to use my gmail or protonmail instead. I've all but given up on owning my own email because the protocol has effectively made it impossible to reliably land mail in a mailbox if you don't have a certain amount of outbound mail traffic.

kureikain 5y ago
did you send to gmail/hotmail/icloud? hotmail and icloud are very sensitive and if IP isn't reach a certain reputation(mail volume+age) it's easiser to land on spam even SPF/DKIM/DMARC are passed. But if the recipient interact with sender(mark as non spam, send a reply) then moving forward email send from that won't be flag as spam anymore. So their spam filtering is kind of weak and they used previous interaction as a signal. gmail, on other hand is rock solid. They have their own false positive obviously but they are rock solid in term of not relying on IP reputation(or less). They are smarte and righfully land your legitimate email on inbox even an email come from a spammy IP.
- bradjohnson 5y ago
  I've not tried icloud, but for personal email addresses that I have tried (gmail, outlook, hotmail, protonmail) I've not had many problems landing in inboxes. For corporate mailservers I almost always have trouble even getting beyond the mail filtering solution. Microsoft EOP (which seems to be the most ubiquitous) will basically blackhole any mail I send without telling me.

kureikain 5y ago

did you send to gmail/hotmail/icloud? hotmail and icloud are very sensitive and if IP isn't reach a certain reputation(mail volume+age) it's easiser to land on spam even SPF/DKIM/DMARC are passed. But if the recipient interact with sender(mark as non spam, send a reply) then moving forward email send from that won't be flag as spam anymore. So their spam filtering is kind of weak and they used previous interaction as a signal. gmail, on other hand is rock solid. They have their own false positive obviously but they are rock solid in term of not relying on IP reputation(or less). They are smarte and righfully land your legitimate email on inbox even an email come from a spammy IP.

bradjohnson 5y ago
I've not tried icloud, but for personal email addresses that I have tried (gmail, outlook, hotmail, protonmail) I've not had many problems landing in inboxes. For corporate mailservers I almost always have trouble even getting beyond the mail filtering solution. Microsoft EOP (which seems to be the most ubiquitous) will basically blackhole any mail I send without telling me.