This function checks whether the server supports SNI (Server Name Indication).

Note:

• Functions that enable Mail SNI succeed with a warning that Mail SNI is always enabled.
• Functions that disable Mail SNI fail and make no changes.

{
  "data": {
    "sni": 1
  },
  "metadata": {
    "command": "is_sni_supported",
    "reason": "OK",
    "result": 1,
    "version": 1
  }
}