72 Definitive Reasons Why Your Emails are Going to SPAM (Reason 27 Will Blow Your Mind)
SendX
JANUARY 22, 2019
Multi-part MIME (Multipurpose Internet Mail Extensions) bundle together a plain text version of your email along with the HTML version. You will find very similar patterns in phishing emails as well. The domain used for phishing attacks This can happen if your domain got compromised by hackers. didn't come up with this theory.
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