func (e *Envelope) GetHeader(name string) string {
	if e.header == nil {
		return ""
	}
	return decodeHeader(e.header.Get(name))
}
func (e *Envelope) GetHeader(name string) string {
	if e.header == nil {
		return ""
	}
	return decodeHeader(e.header.Get(name))
}
func ( e * Envelope ) GetHeader ( name string ) string { if e . header == nil { return " " } return decodeHeader ( e . header . Get ( name ) ) }
// GetHeader processes the specified header for RFC 2047 encoded words and returns the result as a
// UTF-8 string
GetHeader processes the specified header for RFC 2047 encoded words and returns the result as a UTF - 8 string