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Sending an Email with Attachments using Python – Checks for Attachments Before Sending

This is an update to a script I put together several years ago which needed some minor changes to prevent the email from being sent if there were no attachments. Also, there was a bug that would send the email whether attachments were present or not due to the presence of the archive folder in the searched folder. This code should correct that. I changed the script as little as possible, so some may criticize the duplicate if statement. If I have time, I will correct this in the near future. Even so, it should work fine as written.

# Adapted from https://gist.github.com/4009671 and other sources by David Young
# added directory searching functionality to add all files in folder
# disabled username / password logon for use in our Exchange environment


######### Setup your stuff here #######################################
servername='ServerName'
path='//' + servername + '/PathUnderServerName' # location of files
archiveFolderName = 'archive' # name of folder under path where files will be archived

host = 'smtp.example.com' # specify port, if required, using a colon and port number following the hostname

fromaddr = 'yourfromaddress@example.com' # must be a vaild 'from' address in your environment
toaddr  = "yourtoaddress@example.com"
replyto = fromaddr # unless you want a different reply-to

# username = 'username' # not used in our Exchange environment
# password = 'password' # not used in our Exchange environment

msgsubject = 'Your message regarding server named ' + servername

htmlmsgtext = """<h2>Files present on server named """ + servername + """ are attached and have been archived.</h2>""" # text with appropriate HTML tags

######### In normal use nothing changes below this line ###############

import smtplib, os, sys, shutil
from datetime import date
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email import Encoders
from HTMLParser import HTMLParser

archivePath = os.path.join(path, archiveFolderName) # full path where files will be archived

if not os.path.exists(archivePath): # create archive folder if it doesn't exist
    os.makedirs(archivePath)
    print 'Archive folder created at ' + archivePath + '.'

# A snippet - class to strip HTML tags for the text version of the email

class MLStripper(HTMLParser):
    def __init__(self):
        self.reset()
        self.fed = []
    def handle_data(self, d):
        self.fed.append(d)
    def get_data(self):
        return ''.join(self.fed)

def strip_tags(html):
    s = MLStripper()
    s.feed(html)
    return s.get_data()

########################################################################


try:
    # Make text version from HTML - First convert tags that produce a line break to carriage returns
    msgtext = htmlmsgtext.replace('</br>',"\r").replace('<br />',"\r").replace('</p>',"\r")
    # Then strip all the other tags out
    msgtext = strip_tags(msgtext)

    # necessary mimey stuff
    msg = MIMEMultipart()
    msg.preamble = 'This is a multi-part message in MIME format.\n'
    msg.epilogue = ''

    body = MIMEMultipart('alternative')
    body.attach(MIMEText(msgtext))
    body.attach(MIMEText(htmlmsgtext, 'html'))
    msg.attach(body)
    attachments = os.listdir(path)

    if 'attachments' in globals() and len(attachments) > 1: # are there attachments?
        for filename in attachments:
            if os.path.isfile(os.path.join(path, filename)):
                f = os.path.join(path, filename)
                part = MIMEBase('application', "octet-stream")
                part.set_payload( open(f,"rb").read() )
                Encoders.encode_base64(part)
                part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(f))
                msg.attach(part)

    msg.add_header('From', fromaddr)
    msg.add_header('To', toaddr)
    msg.add_header('Subject', msgsubject)
    msg.add_header('Reply-To', replyto)

    # The actual email sendy bits
    server = smtplib.SMTP(host)
    server.set_debuglevel(False) # set to True for verbose output
    
    # Comment this block and uncomment the below try/except block if TLS or user/pass is required.

    if 'attachments' in globals() and len(attachments) > 1: # are there attachments?    
        server.sendmail(msg['From'], [msg['To']], msg.as_string())
        print 'Email sent.'
        #print len(attachments)-1
    else:
        print 'No attachments found.'

    server.quit() # bye bye                

    # try:
        # # If TLS is used
        # server.starttls()
        # server.login(username,password)
        # server.sendmail(msg['From'], [msg['To']], msg.as_string())
        # print 'Email sent.'
        # server.quit() # bye bye
    # except:
        # # if tls is set for non-tls servers you would have raised an exception, so....
        # server.login(username,password)
        # server.sendmail(msg['From'], [msg['To']], msg.as_string())
        # print 'Email sent.'
        # server.quit() # bye bye
                
except:
    print "Email NOT sent to %s successfully. ERR: %s %s %s " % (str(toaddr), str(sys.exc_info()[0]), str(sys.exc_info()[1]), str(sys.exc_info()[2]) )
    #just in case
    
try:
    if 'attachments' in globals() and len(attachments) > 1: # are there attachments?
        for filename in attachments:
            if os.path.isfile(os.path.join(path, filename)):
                f1 = os.path.join(path, filename)
                x = filename.find('.')
                filename2 = filename[:x] + '_' + str(date.today()) + filename[x:]
                f2 = os.path.join(path, filename2)
                os.rename(f1, f2)
                print "File " + filename + " renamed to " + filename2 + "."
                shutil.move(f2, archivePath)
                print "File " + filename2 + " moved to " + archivePath + "."
                           
except:
    print "Files not successfully renamed and/or archived."