messages/email_.py
def _add_header(self):
        """Add email header info."""
        self.message["From"] = self.from_
        self.message["Subject"] = self.subject
        if self.to:
            self.message["To"] = self.list_to_string(self.to)
        if self.cc:
            self.message["Cc"] = self.list_to_string(self.cc)
        if self.bcc:
            self.message["Bcc"] = self.list_to_string(self.bcc)
def _add_header(self):
        """Add email header info."""
        self.message["From"] = self.from_
        self.message["Subject"] = self.subject
        if self.to:
            self.message["To"] = self.list_to_string(self.to)
        if self.cc:
            self.message["Cc"] = self.list_to_string(self.cc)
        if self.bcc:
            self.message["Bcc"] = self.list_to_string(self.bcc)
Add email header info.