Whitelist all contacts or add multiple emails to whitelist at once

Whitelist all contacts or add multiple emails to whitelist at once

Zoho mail seems to be happy to send emails from people in my contact list to the SPAM folder.  Is there a way to prevent this?  There doesn't seem to be an option to whitelist all contacts automatically, and the whitelist interface seems to allow whitelisting only a single address at a time.  Can I bulk import email addresses to the whitelist somehow?