Python — Send Email Using SMTP

Send Mail To Any Internet Machine (SMTP or ESMTP) #PurePythonSeries — Episode #11

Hi in theses last two episodes (01 and 02) of this series we use MS Outlook and yagmail.

But theses two solution brought a problem: If your email is not native, it fatally will lead your email to spam, because the servers do not match.

But using SMTP there is no issue. You access the server itself.

Image from link

Let’s Get Started:

Step-by-Step Index:

Create an SMTP object to connect to the server.
Log in to your account.
Define your message header and your login credentials.
Create a MIMEMultipart object and associate the relevant header with it - example: From:, To:, and Subject.
Associate a message with the MIMEMultipart message object.
Finally, send the message.

01#Step —Login to SMTP Server

import smtplib
server = smtplib.SMTP('<mensager.of.your.cia>', 25)
server.starttls()
server.login("<Your-email>", "<Your-password>")
Out[1]:
(235, b'2.7.0 Authentication successful')

02#Step — Login to SMTP ServerSend email

msg = "Testing SMTP EMAIL "
server.sendmail("<Your-email>", "<Other-email>", msg)
server.quit()

Simple like that!

Now Let’s use Pandas to load the file that brings the list to where we wanto to send email.

03#Step — Load email’s list (Excel file)

# Using PANDAS
import pandas as pd
list_table = pd.read_excel('email_schedule_table.xlsx')
display(list_table)

[this prints your table list]

04#Step — First Single test

# Import smtplib for the actual sending function
import smtplib
import os
base_path = "<to.readme.file>"
filename = "readme"
path_to_file = os.path.join(base_path, filename)
# Import the email modules we'll need
from email.message import EmailMessage
# Open the plain text file whose name is in textfile for reading.
with open(path_to_file, 'r') as fp:
    # Create a text/plain message
    msg = EmailMessage()
    msg.set_content(fp.read())
# me == the sender's email address
# you == the recipient's email address
msg['Subject'] = f'The contents of {textfile}'
msg['From'] = '<your_email>'
msg['To'] = '<another_email>'
# Send the message via our own SMTP server.
s = smtplib.SMTP('<mensager.of.your.cia>')
s.send_message(msg)
s.quit()

05#Step — Now the Multiple Emails

# Import smtplib for the actual sending function
import smtplib
from datetime import datetime
# Import the email modules we'll need
from email.message import EmailMessage
server = smtplib.SMTP('<mensager.of.your.cia>')
for i, email in enumerate(admin_df['Email']):
   Responsavel = admin_df.loc[i, 'Responsible']
   IP = admin_df.loc[i, 'IP']
   Intimation = admin_df.loc[i, 'Intimation']
   Default = admin_df.loc[i, 'Default']
   CNPJ = admin_df.loc[i, 'CNPJ']
   msg = EmailMessage()
   
   body = f"""\
   To{IP} - N°: {CNPJ}
   {Responsible}
   Dear Administrator - DIMP (Declaration of Means of Payments) -    
   Public Sector:
   We request the (re)transmission of DIMP files related to the
     period(s) recorded below (month/year):
    {Default.split(';')}
    Motivations:
   EXCLUSIVELY FOR UPDATING AND UPDATING PURPOSES IN THE 
   INSTITUTIONAL DATABASE OF THIS CIA; PLEASE SEND ALL    
   FILES WITH NORMAL PURPOSE.
   Thank you.
   Sincerely,
   ------------------------
   <your_name>
   <your_title>
   <your_sector>
   EMAIL: <your_email>
   TEL: <your_contact>
   ------------------- """
msg.set_content(body)
# me == the sender's email address
# you == the recipient's email address
msg['Subject'] = f" Report of Omissions DA {IP} - {CNPJ} - FOR FINANCE CIA - AT - Request No. {Intimation} "
msg['From'] = '<your_email>'
msg['To'] = email
# Send the message via our own SMTP server.
#server = smtplib.SMTP('<mensager.of.your.cia>')
print("Email successfully sent!")

Email successfully sent!!

That’s it!

Bye o/

👉Jupiter notebook link :)

👉Google Drive

👉git

Credits & References:

https://stackoverflow.com/questions/41845518/jupyter-anaconda-load-text-file-into-python/48785326
Official smtplib — SMTP protocol client: https://docs.python.org/3/library/smtplib.html
examples: https://docs.python.org/3/library/email.examples.html#email-examples
com HTML: https://code.tutsplus.com/pt/tutorials/sending-emails-in-python-with-smtp--cms-29975
Python: “subject” not shown when sending email using smtplib module: https://stackoverflow.com/questions/7232088/python-subject-not-shown-when-sending-email-using-smtplib-module
Jupyter Anaconda: load text file into python: https://stackoverflow.com/questions/41845518/jupyter-anaconda-load-text-file-into-python/48785326
date: 10/2021

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