SMTP Error invalid certificate

LenaHeLenaHe Posts: 2Member
Hello everyone,

I get an error when I try to send a test email in smtp setup.
The Mail Server is smtp.office365.com with port 587 and "secure connection" is checked.
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The port is open, I have tested the connection with telnet.
Do you have an idea what is missing?

Thank you for your help.

Best Regards,
Lena

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