curl --request GET \
  --url https://api.anchorbrowser.io/v1/identities/{identityId}/email/emails/{emailId} \
  --header 'anchor-api-key: <api-key>'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "from": "<string>",
  "subject": "<string>",
  "body_text": "<string>",
  "body_html": "<string>",
  "message_id": "<string>",
  "received_at": "<string>"
}