The target is to publish at least one post per month.
Initially, it was one per week, but the research for the first article
was so demanding that I decided to give me more time to collect the information
so that the work, in the end, will be easier.
It gave interesting results, that are different from what I expected.
I believed that spf and dkim alone were enough
to influence emails delivery and protect against spoofing.
The data took to different conclusions: without dmarc nothing works fine.
Dmarc should be considered “mandatory”
if you want to communicate with Google Mail and Office 365 mailboxes.