how to set up a mail server and send emails using python SMTP-CodePudding

I would like to send an email with Python smtplib from a custom email address that is linked to a gmail account. The address ends with '.org'. I set up the App Password on the gmail account that the address is linked to. This is my code:

def send_email_from_gmail(**kwargs):
    '''
    kwparams:
    receivers: list
    event_datetime: str
    event_name: str
    parent_name: str
    event_date: str
    event_time: str
    student_name: str
    location: str,
    location_link: str
    '''
    email_data = json.load(open('email_info.json'))

    receivers = kwargs['receivers']
    sender = email_data['email_address']

    msg = EmailMessage()
    msg['Subject'] = email_data['subject'].format(kwargs['event_datetime'], kwargs['event_name'])
    msg['From'] = sender
    msg['To'] = receivers

    msg.set_content(email_data['email'].format(kwargs['parent_name'], kwargs['event_date'], kwargs['event_time'], kwargs['student_name'], kwargs['location'], kwargs['location_link']))

    app_pass = email_data['email_pass']

    with smtplib.SMTP_SSL(host='smtp.gmail.com', port=465) as smtp:
        try:
            smtp.login(sender, app_pass)
            smtp.send_message(msg)
            return {'success': True}
        except:
            return {'success': False}

This is the error:

Traceback (most recent call last):
  File "/Users/ayushpal/MatrixLearning/websitebackend/email_testing.py", line 55, in <module>
    print(send_email_from_gmail(**sample_args))
  File "/Users/ayushpal/MatrixLearning/websitebackend/email_testing.py", line 33, in send_email_from_gmail
    with smtplib.SMTP_SSL(host='smtp.matrixlearning.org', port=587) as smtp:
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 1050, in __init__
    SMTP.__init__(self, host, port, local_hostname, timeout,
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 255, in __init__
    (code, msg) = self.connect(host, port)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 341, in connect
    self.sock = self._get_socket(host, port, self.timeout)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 1056, in _get_socket
    new_socket = super()._get_socket(host, port, timeout)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 312, in _get_socket
    return socket.create_connection((host, port), timeout,
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/socket.py", line 824, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/socket.py", line 955, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

If I set the host to 'smtp.{my-domain}.com' instead of '.org', the program runs for about 5 minutes without doing anything before timing out and losing connection.

How can I solve this?

CodePudding user response：

According to DNS queries from my comp smtp.matrixlearning.org has no DMS records so it can not be mapped to IP address.

Traceback (most recent call last):
…
  File "/Users/ayushpal/MatrixLearning/websitebackend/email_testing.py", line 33, in send_email_from_gmail
    with smtplib.SMTP_SSL(host='smtp.matrixlearning.org', port=587) as smtp:
…
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

CodePudding user response：

In order to use your own mail server: You need to have a vps(Virtual Private Server)

After that:

Step 1: Set a Hostname and Create DNS Records for Domain

Step 2: Installing Apache or Nginx, MariaDB(any DB you prefer) on Ubuntu

Step 3: Installing Postfix Mail Server on Ubuntu

Step 4: Testing Postfix Mail Server on Ubuntu

Step 5: Installing Dovecot IMAP and POP in Ubuntu

Step 6: Installing Roundcube Webmail in Ubuntu

Step 7: Create an Apache Virtual Host for Roundcube Webmail

Step 8: Creating Mail Users

Follow this tutorial might help you!

CodePudding user response：

I had to attach the mailbox of my custom domain server to gmail before using gmail as the server to send emails. Thank you to everyone who answered!