https://email-spam-tester.com/blog/Email deliverability notes by Serhii Tanichev, developer of Email Spam Tester.enhttps://email-spam-tester.com/blog/why-are-my-emails-going-to-spam/https://email-spam-tester.com/blog/why-are-my-emails-going-to-spam/Tue, 15 Sep 2026 08:00:00 +0000A developer who reads mail headers for a living walks through the real reasons a message ends up in spam, from SPF and DKIM alignment to your own reputation.hi@email-spam-tester.com (Serhii Tanichev)