These are my direct settings per microsoft 365
Server name: smtp.office365.com
Port: 587
Encryption method: STARTTLS
Email address - [email protected]
Email display name - Orders Dept
Host - smtp.office365.com
Port - 587
User - [email protected]
Password - ********
SSL - true
This is the error that I am getting
An error occurred while attempting to establish an SSL or TLS connection. This usually means that the SSL certificate presented by the server is not trusted by the system for one or more of the following reasons: 1. The server is using a self-signed certificate which cannot be verified. 2. The local system is missing a Root or Intermediate certificate needed to verify the server's certificate. 3. A Certificate Authority CRL server for one or more of the certificates in the chain is temporarily unavailable. 4. The certificate presented by the server is expired or invalid. Another possibility is that you are trying to connect to a port which does not support SSL/TLS. It is also possible that the set of SSL/TLS protocols supported by the client and server do not match. See https://github.com/jstedfast/MailKit/blob/master/FAQ.md#SslHandshakeException for possible solutions.