def email_it(server, headers, text=None, html=None, password=None):
"""Send an email -- with text and HTML parts.
@param server {str} The SMTP server (e.g. mail.example.com) via which
to send the email.
@param headers {dict} A mapping with, at least: "To", "Subject" and
"From", header values. "To", "Cc" and "Bcc" values must be *lists*,
if given.
@param text {str} The text email content.
@param html {str} The HTML email content.
Derived from <http://code.activestate.com/recipes/576824/>
"""
from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText
import smtplib
if text is None and html is None:
raise ValueError("neither `text` nor `html` content was given for "
"sending the email")
if not ("To" in headers and "From" in headers and "Subject" in headers):
raise ValueError("`headers` dict must include at least all of "
"'To', 'From' and 'Subject' keys")
# Create the root message and fill in the from, to, and subject headers
msg_root = MIMEMultipart('related')
for name, value in headers.items():
msg_root[name] = isinstance(value, list) and ', '.join(value) or value
msg_root.preamble = 'This is a multi-part message in MIME format.'
# Encapsulate the plain and HTML versions of the message body in an
# 'alternative' part, so message agents can decide which they want
# to display.
msg_alternative = MIMEMultipart('alternative')
msg_root.attach(msg_alternative)
# Attach HTML and text alternatives.
if text:
msg_text = MIMEText(text.encode('utf-8'))
msg_alternative.attach(msg_text)
if html:
msg_text = MIMEText(html.encode('utf-8'), 'html')
msg_alternative.attach(msg_text)
to_addrs = headers["To"] \
+ headers.get("Cc", []) \
+ headers.get("Bcc", [])
from_addr = msg_root["From"]
smtp = smtplib.SMTP(server)
smtp.sendmail(from_addr, to_addrs, msg_root.as_string())
smtp.quit()
