Zoho Mail

https://www.zoho.com/mail/
Recommended Configuration Proprietary
Alternate Configuration 1 Proprietary; SMS
Alternate Configuration 2 Authenticator; U2F
Alternate Configuration 3 SMS
Account/Password Recovery PR SMS; PR email
Remarks 1-step login available via PR SMS number
Responses

Notified on January 11, 2020.

Closed as non-issue on January 20, 2020; claimed that its current policy-which disallows the same number to be used for recovery and MFA-is secure and does not require any changes.

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