func (mm *mimeMessage) addValues(p *simplehttp.FormDataPayload) {
p.AddReadCloser("message", "message.mime", mm.body)
}
func (pm *plainMessage) addValues(p *simplehttp.FormDataPayload) {
p.AddValue("from", pm.from)
p.AddValue("subject", pm.subject)
p.AddValue("text", pm.text)
for _, cc := range pm.cc {
p.AddValue("cc", cc)
}
for _, bcc := range pm.bcc {
p.AddValue("bcc", bcc)
}
if pm.html != "" {
p.AddValue("html", pm.html)
}
}