When sending large count email response this error 554, Transaction failed: Duplicate header subject. I'm use smtplib+ aws SES. For all messages, the header must be the same. How can I fix this error? If send message without subject, all working.
import smtplibimport jsonfrom email.mime.multipart import MIMEMultipartfrom email.mime.text import MIMETextargs = []msg = MIMEMultipart('alternative')msg['From'] = 'noreply@example.com'html = open('mail.html').read()EMAIL_HOST = 'email-smtp...'EMAIL_HOST_USER = 'sss'EMAIL_HOST_PASSWORD = 'ssssss'EMAIL_PORT = 587def lambda_handler(event, context): body = event['Records'][0]['Sns']['Message'] global args args = json.loads(body)['args'] set_worker(json.loads(body)['method'])() return 'success'def set_worker(method): return {'email' : email }.get(method, 'Not found')def email(): global msg, html name = args[0] title = args[1] msg_body = args[2] email = args[3] url = args[4] subject = "Test" msg['Subject'] = subject msg['To'] = email html = html.format(title, community_name, title, msg_body, community_name) mime_text = MIMEText(html, 'html') msg.attach(mime_text) send_message()def send_message(): mail = smtplib.SMTP(EMAIL_HOST, EMAIL_PORT) mail.ehlo() mail.starttls() mail.login(EMAIL_HOST_USER, EMAIL_HOST_PASSWORD) mail.sendmail(msg['From'], msg['To'], msg.as_string())