We are trying to set WP SMTP with Office365 smtp server. The settings are saved ok, but trying to send a test email message, after hitting “Send Test”, the page hangs for about 3 minutes and then returns an error message 504 gateway timeout.
Could you please advise what may cause this, or any idea how to troubleshoot it?
Another oddity: The error message reads “Nginx”, even though our account is hosted on Apache…
Thanks again and in advance
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