How to Send an Email with Attachment in Python using AWS Boto?

In this tutorial, we are going to see how to send an email with attachment in Python using Amazon’s Boto library. In my current project I had an requirement to send a report in the email with attachment. I implemented it in Python. So I thought it will be good for my readers to learn how to send mail with attachment using Python.

Checkout my previous article on How to convert Text to Speech using Amazon Polly API

For that you must import some libraries of Python. In order to attach the file in the email content, you need to import the following libraries

• import boto3
• from botocore.exceptions import ClientError
• from email.mime.multipart import MIMEMultipart
• from email.mime.text import MIMEText
• from email.mime.application import MIMEApplication
• import urllib
• import os.path

Getting started with Boto 3 is easy, but requires a few steps. Install the latest Boto 3 release via pip:

pip install boto3

To use Boto 3, you must first import it and tell it what service you are going to use and A low-level client representing Amazon Simple Email Service (SES):

import boto3
client = boto3.client('ses')

In order to handle errors & exception in the email sending process, I would like import botocore.exceptions

 from botocore.exceptions import ClientError

urllib library is used to download the content from the url. For python 3 users, please use urllib.request

To get the extension for the file url, I have used os.path library

extension = os.path.splitext(attachmentUrl)[1]

If a message has a multipart Content-Type, that means it consists of multiple messages and each of them defines its own Content-Type (which can again be multipart or something else). Multipart messages are in Python represented by MIMEMultipart class.

MIMEText is used to send either html email or plain text email

Sending Plain Text Email

part = MIMEText(body, 'plain')

Sending HTML Text Email

part = MIMEText(body, 'html')

Python code to Send an email with Attachment using AWS Boto

import boto3

from botocore.exceptions import ClientError

from email.mime.multipart import MIMEMultipart

from email.mime.text import MIMEText

from email.mime.application import MIMEApplication

import urllib

import os.path
region = "AWS REGION"

sws_user = "AWS ACCESS KEY"

sws_key = "AWS SECRET KEY"

subject = 'Sending email with Attachment - W3lessons'

body = "Please find the attached content - Thanks, Team W3lessons"
client = boto3.client(service_name = 'ses', region_name = region, aws_access_key_id = sws_user, aws_secret_access_key = sws_key)
  
 

message = MIMEMultipart()

message['Subject'] = subject

message['From'] = "karthi@w3lessons.info"

message['To'] = "youremail@domain.com"
# message body

part = MIMEText(body, 'html')

message.attach(part)
attachmentUrl = "https://w3lessons.info/logo.png"

AttachementData = urllib.urlopen(attachmentUrl)

#get file extension

extension = os.path.splitext(attachmentUrl)[1]
txt = AttachementData.read()
fileName = "attachment"+extension

part = MIMEApplication(txt)

part.add_header('Content-Disposition', 'attachment', filename=fileName)

message.attach(part)
  
 

destination = { 'ToAddresses' : [message['To']], 'CcAddresses' : [], 'BccAddresses' : []}
try:

result = client.send_raw_email(Source = message['From'], Destinations = message['To'], RawMessage = {'Data': message.as_string(),})

return {'message': 'error','status' : 'fail'} if 'ErrorResponse' in result else {'message': 'mail sent successfully', 'status' : 'success'}

except ClientError as e:

return {'message': e.response['Error']['Message'],'status' : 'fail'}

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above