Method Send

email/email.go:94–179

(m *Message)

}

func (e *Email) Send(m *Message) (err error) {
	// Message header
	m.buffer = bytes.NewBuffer(make([]byte, 256))
	m.buffer.Reset()
	m.boundary = random.String(16)
	m.writeHeader("MIME-Version", "1.0")
	m.writeHeader("Message-ID", m.ID)
	m.writeHeader("Date", time.Now().Format(time.RFC1123Z))
	m.writeHeader("From", m.From)
	m.writeHeader("To", m.To)
	if m.CC != "" {
		m.writeHeader("CC", m.CC)
	}
	if m.Subject != "" {
		m.writeHeader("Subject", m.Subject)
	}
	// Extra
	for k, v := range e.Header {
		m.writeHeader(k, v)
	}
	m.writeHeader("Content-Type", "multipart/mixed; boundary="+m.boundary)
	m.buffer.WriteString("\r\n")

	// Message body
	if m.BodyText != "" {
		m.writeText(m.BodyText, "text/plain")
	} else if m.BodyHTML != "" {
		m.writeText(m.BodyHTML, "text/html")
	} else {
		m.writeBoundary()
	}

	// Inlines/attachments
	for _, f := range m.Inlines {
		m.writeFile(f, "inline")
	}
	for _, f := range m.Attachments {
		m.writeFile(f, "attachment")
	}
	m.buffer.WriteString("--")
	m.buffer.WriteString(m.boundary)
	m.buffer.WriteString("--")

	// Dial. Port 465 is SMTPS (implicit TLS) per IANA and always uses
	// TLS. Other ports connect plaintext and opportunistically upgrade
	// to STARTTLS only if the server advertises it — if the server
	// doesn't, the connection stays in the clear. Operators that
	// require TLS must use port 465.
	c, err := e.dial()
	if err != nil {
		return
	}
	defer c.Quit()

	// Authenticate
	if e.Auth != nil {
		if err = c.Auth(e.Auth); err != nil {
			return