Microsoft is blocking emails from the VPS provider Digital Ocean network. Even though I have a perfect 10/10 score for email deliver-ability (SPF+DKIM, #^https://www.mail-tester.com/test-leijn).
How do I set the user to be verified in the database with an UPDATE statement?
to=<email@example.com>, relay=live-com.olc.protection.outlook.com[184.108.40.206]:25, delay=0.51, delays=0.08/0.02/0.31/0.1, dsn=5.7.1, status=bounced (host live-com.olc.protection.outlook.com[220.127.116.11] said: 550 5.7.1 Unfortunately, messages from [18.104.22.168] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to #^http://mail.live.com/mail/troubleshooting.aspx#errors. [AM5EUR02FT032.eop-EUR02.prod.protection.outlook.com] (in reply to MAIL FROM command))
Also, how do I re-send a registration email to old accounts that never verified (because Gmail was blocking emails).