Proper MIME prevents DKIM failures in Outlook

At Postmastery, we work for various ESPs and brands to optimise email delivery. Recently, one of our clients faced a mysterious DKIM failure when sending mail to Outlook.com domains.¬†(A generic explanation of what DKIM is and how it works is available on dkim.org.) Analysing SMTP headers The first thing we did was to analyse the […]

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Categories: Authentication, General