import textwrap

import smtplib
from email.mime.text import MIMEText

class NameThingy:
    def __init__(self, name):
        self.name = name
    def __getattribute__(self, attrname):
        name = object.__getattribute__(self, 'name')
        return NameThingy(f'{name}.{attrname}')
    def __matmul__(self, other):
        name = object.__getattribute__(self, 'name')
        othername = object.__getattribute__(other, 'name')
        return NameThingy(f'{name}@{othername}')

class EmailMetaNamespace(dict):
    def __missing__(self, index):
        if isinstance(index, str) and not index.startswith('_'):
            return NameThingy(index)
        raise KeyError(index)

class EmailMeta(type):
    @classmethod
    def __prepare__(cls, name, bases, **kwargs):
        return EmailMetaNamespace()
    def __new__(cls, name, bases, namespace, **kwargs):
        annotations = namespace['__annotations__']
        subject = annotations['Subject']
        from_ = object.__getattribute__(annotations['From'], 'name')
        to = object.__getattribute__(annotations['To'], 'name')
        body = textwrap.dedent(annotations['Body'])

        msg = MIMEText(body)
        msg['Subject'] = subject
        msg['From'] = from_
        msg['To'] = to

        print('Pretending to send the following email:')
        print(msg.as_string())

Email = type.__new__(EmailMeta, 'Email', (), {})

class Message(Email):
    From:    me@gmail.com
    To:      you@gmail.com
    Subject: "Let's get nachos"
    Body: '''\
        Man, wouldn't nachos be nice?
        Let's go get some.'''