Strange thing is, when I send via SMTP directly, I get a 10/10 score. But when I send using PHP’s mail() function (which is configured to relay through SMTP), the issue appears.
Hey folks,
I’ve set up SPF and DKIM correctly — both check out fine on MailTested — Email Deliverability & Spam Test Tool
But Outlook still keeps marking my emails as spam, while Gmail delivers fine.
Ran a quick deliverability test please see the result here...