email.py

import sys
import email
import dateutil.parser
import sqlite3

mail = sys.stdin.read()
msg = email.message_from_string(mail)
datetime = dateutil.parser.parse(msg["DATE"])
thedata = {
    "subject" : msg["SUBJECT"],
    "from" : msg["FROM"],
    "to" : msg["TO"],
    "date" : datetime.strftime("%m%d"),
    "time" : datetime.strftime("%H%M%S")
}

for part in msg.walk():
    if part.get_content_type() == "text/plain":
        thedata["content"] = part.get_payload()

query = "INSERT INTO emails (from_email, to_email, content, subject, date, time) values (:from, :to, :content, :subject, :date, :time)"
conn = sqlite3.connect("/path/to/the/database/emails.sqlite")
cur = conn.cursor()
cur.execute(query, thedata)
conn.commit()
conn.close()