If all of your emails, sent from php mail, or sendmail, are being put straight into the spam box, the way I fixed it was by changing line 318 in inc/class_mailhandler.php from :
Now all of the mail, whether it be a user emailing another user, or a mass email, will go to the inbox, rather than the spam box.
MyBB Tutorials
Fix for MyBB emails going to spam box
Submitted by HaVoK, 24-02-2016, 02:18 AM, Thread ID: 18645
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