O365 e-mail account as SMTP server

Questions ArchiveCategory: Email MarketingO365 e-mail account as SMTP server
Jordan van Bergen asked 1 week ago

I can use O365 with SMTP settings to send out test e-mails using: https://h-educate.com/super-email-sender/
But as soon as I want to send out using the RUN CAMPAIGN button I get:
ERROR: BDAT command has been rejected by ….. the rest I can’t read. 
What’s happening if you get this error message? 
 
But it works with a test e-mail address. One by One all will come in and are okay. Using the RUN CAMPAIGN button I get the error. 

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