receive_email/tests/send_test.py

from smtplib import SMTP as Client

client = Client("localhost", 8025)

r = client.sendmail('a@example.com', ['b@example.com'], """\
From: Anne Person <anne@example.com>
To: Bart Person <bart@example.com>
Subject: A test
Message-ID: <ant>

Hi Bart, this is Anne.
""")