How to send an email with attachment in python

Probably you are here now because you want to know how to send a mail with attachment or many attachments. So we will do that in the best way.

sending a mail with attachment

If you would use the Gmail server you must enable POP download and IMAP access in your account settings, you also must enable less secure app access in your settings.

syntax:

import os
import smtplib 
from os.path import basename
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.utils import COMMASPACE, formatdate
from email.mime.base import MIMEBase
from email import encoders


server = smtplib.SMTP()
server.connect('smtp.gmail.com','587')
server.ehlo()
server.starttls()
server.login("ex@gmail.com", "password") #log in to the server


email_from = 'ex0@gmail.com' # email_sender
email_to = 'exx@gmail.com' # email_receiver
Subject = 'helloworld' # subject 
attachment = '/home/py/Desktop/pytutorial-project/file.txt' #attachment
content = '<h1>Hello world</h1>' #content


msg = MIMEMultipart() 
msg['From'] = email_from 
msg['To'] = email_to 
msg['Subject'] = Subject

with open(attachment, 'rb') as attachments: 
    file_name = os.path.basename(attachment) #getting basename file
    part = MIMEBase('application','octet-stream') # Content-Type
    part.set_payload(attachments.read()) # seting the payload
    part.add_header('Content-Disposition', "attachment; filename= %s" % file_name)  
    encoders.encode_base64(part)
    msg.attach(part) #attaching the file

server.sendmail(email_from, email_to, msg.as_string()) # sending the email
# sucess message
print('the mail has been sent')

sending a mail with a many attachments

if would like send an email with many attachments you can do this

syntax:

server = smtplib.SMTP()
server.connect('smtp.gmail.com','587')
server.ehlo()
server.starttls()
server.login("ex@gmail.com", "password") #log in to the server


email_from = 'ex0@gmail.com' 
email_to = 'exx@gmail.com' 
Subject = 'helloworld'  
attachment = ['/home/py/Desktop/pytutorial-project/file.txt', '/home/py/Desktop/pytutorial-project/file2.txt', '/home/py/Desktop/pytutorial-project/file3.txt'] #list of attachments
content = '<h1>Hello world</h1>' 


msg = MIMEMultipart() 
msg['From'] = email_from 
msg['To'] = email_to 
msg['Subject'] = Subject

#send multi attachment
for x in attachment:
    with open(x, 'rb') as attachments: 
        file_name = os.path.basename(x) 
        part = MIMEBase('application','octet-stream') 
        part.set_payload(attachments.read()) 
        part.add_header('Content-Disposition', "attachment; filename= %s" % file_name)  
        encoders.encode_base64(part)
        msg.attach(part) #attaching the file

msg.attach(MIMEText(content, 'html')) #attaching the message as html

server.sendmail(email_from, email_to, msg.as_string()) # sending the email
# sucess message
print('the mail has been sent')