--- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
from: Bay <memberbay+12345@members.somewhat>
from_email: memberbay+12345@members.somewhat
from_display_name: Bay
to: bay@example.com
subject: strange email with empty text/plain
body: "<b>some html text</b>"
content_type: text/html
attachments:
- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  data: "<b>some html text</b>\n"
  filename: message.html
  preferences: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
    content-alternative: true
    original-format: true
    Mime-Type: text/html
    Charset: utf-8