Email delivery used to be simple.
Set up SMTP, send emails, done.
That’s no longer true.
We recently investigated a case where a client’s system was sending thousands of transactional emails daily – and some of them were silently failing. No clear errors, no obvious pattern. Just users saying: “I didn’t receive the email.”
What we found is a good example of how modern email delivery actually works today.
Continue reading “SPF, DKIM, DMARC in the Real World: Fixing Email Delivery Issues Across SendGrid, Microsoft, and Yahoo”