SMTP Settings


Custom SMTP Server	Enable or disable the SMTP connection
Host
Port
Enable TLS	TSL (Transport Layer Security) for more secure connection which can work with the TLS and SSL (Secure Socket Layer) encryption protocols.
Authentication Type	SMTP Auth – Authentication protocol where you need to provide the user name and password. - OAuth 2.0 Resource Owner and Client Credentials
User Name
Password

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SendGrid
If you are using SendGrid, use the API Key method to send SMTP where the username will be "apikey" and the password will be the generated API Key from SendGrid.