“smtp docs say to set”
Well it’s hard to tell which fits what discourse requires specifically – but in terms of what is their SMTP configuration, they say this:
SMTP Configuration settings for Zoho Mail - SSL
Outgoing Server Name: smtp.zoho.com
Port: 465
Security Type: SSL
Require Authentication: Yes.
Email address should match the email address/ aliases of the account, for which the authentication details are provided.
SMTP Configuration settings for Zoho Mail - TLS
Outgoing Server Name: smtp.zoho.com
Port: 587
Security Type: TLS
Require Authentication: Yes.
Email address should match the email address/ aliases of the account, for which the authentication details are provided.
via: SMTP - Simple Mail Transfer Protocol Configuration in Zoho Mail