Sending attachment from s3 to ses via lambda - amazon-s3

Question

I am trying to send the attachment files that I read from S3 to SES mail from my lambda function. Attaching the code, the mail is being sent successfully but I am not receiving the emails, can someone please look if I am missing something?
I have not encountered any error, if I remove the attachment part of code the mail is received as expected.
import boto3
import json
import os
import requests
import io
import zipfile
from botocore.exceptions import ClientError
from email import encoders
from email.mime.base import MIMEBase
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import base64
# Create SQS, SES clients
sqs = boto3.client('sqs')
ses = boto3.client('ses')
s3 = boto3.client('s3')
def compose_email(recipients, sender, subject, body, attachment):
msg = MIMEMultipart()
msg.set_charset("utf-8")
msg['From'] = sender
msg['To'] = ", ".join(recipients)
msg['Subject'] = subject
msg.attach(MIMEText(body.encode("utf-8"), 'plain', 'UTF-8'))
if attachment:
part = MIMEBase('application', "octet-stream")
part.set_payload(attachment['data'])
encoders.encode_base64(part)
part.add_header('Content-Disposition', 'attachment', filename=attachment['name'])
msg.attach(part)
return msg
def lambda_handler(event, context):
"""Sample Lambda function which reads from the SQS and fetch data from the API based on the api_url and body
received from SQS, uses API data to send emails.
"""
for record in event['Records']:
bucket_name = 'cvbucket'
data = {
"to_email": ["test#gmail.com"],
"body": "First email Test",
"subject": "Hey!",
"attachment_name": ["abc.pdf", "def.pdf"]
}
in_memory_zip = io.BytesIO()
with zipfile.ZipFile(in_memory_zip, mode='w') as zf:
for file_name in data["attachment_name"]:
# Read the file from S3
file = s3.get_object(Bucket=bucket_name, Key=file_name)
file_content = file['Body'].read()
# Add the file to the zip
zf.writestr(file_name, file_content)
in_memory_zip.seek(0)
zip_data = in_memory_zip.read()
recipients = data['to_email']
sender = os.environ['SES_SENDER_IDENTITY']
subject = data['subject']
body = data['body']
# Add the attachment to the email
attachment = {
'name': 'attachment.zip',
'data': base64.b64encode(zip_data).decode('utf-8')
}
message = compose_email(recipients, sender, subject, body, attachment)
try:
#Provide the contents of the email.
response = ses.send_raw_email(
Source=sender,
Destinations=recipients,
RawMessage={
'Data':message.as_string(),
},)
except ClientError as e:
print(e.response['Error']['Message'])
else:
print("Email sent! Message ID:"),
print(response['MessageId'])