# File lib/action_mailer/vendor/tmail/net.rb, line 219
219:     def exec( mail )
220:       mail.mime_version = '1.0'
221:       b = mail.body
222:       if NKF.guess(b) != NKF::BINARY
223:         on_text b
224:       else
225:         on_binary b
226:       end
227:     end

     # File lib/action_mailer/vendor/tmail/net.rb, line 235
235:     def on_binary( body )
236:       mail.body = [body].pack('m')
237:       mail.set_content_type 'application', 'octet-stream'
238:       mail.encoding = 'Base64'
239:     end

     # File lib/action_mailer/vendor/tmail/net.rb, line 229
229:     def on_text( body )
230:       mail.body = NKF.nkf('-j -m0', body)
231:       mail.set_content_type 'text', 'plain', {'charset' => 'iso-2022-jp'}
232:       mail.encoding = '7bit'
233:     end