I'm trying to set up PingOne for Customers to integrate email services with Office365 and I'm receiving this message when testing the connection:
Could not connect to SMTP host: smtp.office365.com, port: 587; nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?.
Ping support provided this guidance:
Looks like Office365 supports 'STARTTLS '(TLS) while 'SSL' connection is expected by PingOne (SMTPS).
Has anyone else seen this error message before? Is there a way to configure Office365 for SSL?
