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Avoid Email Spam By Building a Secure Form in Python 

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Evite el spam de correo electrónico creando un formulario seguro en Python

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Kerülje el az e-mail spameket egy biztonságos űrlap létrehozásával a Pythonban 

Hindari Spam Email dengan Membangun Formulir Aman di Python

Evita lo spam via email creando un modulo sicuro in Python

Python で安全なフォームを構築してメールスパムを回避する

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Iwasan ang Email Spam Sa Pamamagitan ng Pagbuo ng Secure Form sa Python 

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For software products of every scale, emails are the de facto standard for notifying your users. It’s a fast, cost-effective, and readily accessible channel for reaching your users, especially if you’re sending transactional emails or generating event-driven alerts. In this post, I’ll go over three ways to send emails with Python. Apps can leverage Python for sending emails for an array of use cases. For example, you can generate alarms if things go south in production, send confirmation emails to new users, or notify users of new activity in your app. 3 ways to send emails from your Python app There are three main options for sending an email with Python: SMTP, a transactional email service, and a multichannel notifications service. Below, I’ll review the pros and cons of each option. Then, in the next section, I’ll walk you through three different code tutorials for using each option to send emails with Python. 1. Using SMTP Python has a built-in module for sending emails via SMTP, making getting started with email a piece of cake. Pros of using SMTP Easy to set up Highly cost-effective Platform agnostic Cons of using SMTP Less secure No built-in analytics Longer send times Long-term maintenance and uptime burden 2. Using a transactional email service You can also easily integrate third-party like , , and . If you are planning to send a high volume of emails or need to ensure deliverability, a hosted email API can be a great option and many providers offer a free or low-cost plan to start. transactional email APIs SendGrid Mailgun AWS SES Pros of transactional email services Feature-rich, e.g., analytics High email delivery rates Better email delivery speeds Scalability and reliability Cons of transactional email services The learning curve for new API Dependent on third-party intermediary 3. Using a multichannel notifications service Finally, you can use a multichannel notifications service if you’re planning to notify users on more than one channel. , for example, gives you one uniform API to notify users over email, SMS, push, and chat apps like Slack and WhatsApp. Plus, you’ll get a drag-and-drop template builder and real-time logs and analytics for all your channels. Courier Even if you’re only sending emails today, multichannel notifications services can save you time and money. With a platform like Courier, you can easily add new channels, switch email service providers, or even add backup providers without writing any additional code. You get a complete notifications system that can scale with your product’s growth. Pros of multichannel notifications services Single API for multiple channels Easy to manage cross-channel delivery Less code to write and maintain Cons of multichannel notifications services Additional third-party intermediary Tutorial: How to send emails using SMTP in Python You can use Python’s module to send email using SMTP (Simple Mail Transfer Protocol), which is an application-level protocol. Note that the module makes use of the protocol for SMTP. I’ll show you how to use Gmail’s SMTP server for this walkthrough. built-in smtplib RFC 821 Set up a Gmail account for sending your emails. Since you’ll be feeding a plaintext password to the program, Google considers the SMTP connection less secure. 2. Go to the account settings and to access the account. As an aside, Gmail doesn't necessarily use SMTP on their internal mail servers; however, Gmail SMTP is an interface enabled by Google's server. Thus, you might find in email clients like Thunderbird, Outlook, and others. allow less secure apps smtp.gmail.com smtp.gmail.com 3. Import . Since Python comes pre-packaged with , you have to create a Python file and import into it. smtplib smtplib smtplib 4. To create a secure connection, you can either use with 465 port or with 587 port. The former creates an SMTP connection that is secured from the beginning. The latter creates an unsecured SMTP connection that is encrypted via . SMTP_SSL() .starttls() .starttls() To send email through : SMTP_SSL() import smtplib

gmail_user = 'your_email@gmail.com'
gmail_password = 'your_password'

sent_from = gmail_user
to = ['person_a@gmail.com', 'person_b@gmail.com']
subject = 'Lorem ipsum dolor sit amet'
body = 'consectetur adipiscing elit'

email_text = """\
From: %s
To: %s
Subject: %s

%s
""" % (sent_from, ", ".join(to), subject, body)

try:
    smtp_server = smtplib.SMTP_SSL('smtp.gmail.com', 465)
    smtp_server.ehlo()
    smtp_server.login(gmail_user, gmail_password)
    smtp_server.sendmail(sent_from, to, email_text)
    smtp_server.close()
    print ("Email sent successfully!")
except Exception as ex:
    print ("Something went wrong….",ex) To send email through : .starttls() import smtplib 
try: 
    #Create your SMTP session 
    smtp = smtplib.SMTP('smtp.gmail.com', 587) 

   #Use TLS to add security 
    smtp.starttls() 

    #User Authentication 
    smtp.login("sender_email_id","sender_email_id_password")
    
    #Defining The Message 
    message = "Message_you_need_to_send" 
    
    #Sending the Email
    smtp.sendmail("sender_email_id", "receiyer_email_id",message) 

    #Terminating the session 
    smtp.quit() 
    print ("Email sent successfully!") 

except Exception as ex: 
    print("Something went wrong....",ex) Now that you've initiated a secured SMTP connection, you can move forward and write your message and pass it to . .sendmail() Tutorial: How to send emails using a transactional email service in Python Consider using a , if you need to send a high volume of transactional emails or optimize deliverability. There are many to choose from, including Amazon SES, Mailgun, and Postmark, and the vast majority support Python. transactional email service In this tutorial, I’m going to use , one of the most popular email APIs. What sets a service like SendGrid apart from SMTP are the out-of-the-box features. SendGrid offers easy integration with a simple API, email analytics, round-the-clock support, and high deliverability rates. SendGrid Setting up SendGrid with Python is a fairly simple process: Create an . SendGrid’s free plan includes 100 emails per day. account with SendGrid Generate and store a SendGrid API key and provide full access to permissions. Mail Send Create a Python script and start using the API. To begin using SendGrid’s API via Python, follow these steps: 1. To install the package on your machine, refer to SendGrid's or directly install via . sendgrid GitHub installation guide pip install sendgrid 2. To use the package in a Python script: import sendgrid
import os
from sendgrid.helpers.mail import Mail, Email, To, Content 3. To assign your API key to the SendGrid API client: my_sg = sendgrid.SendGridAPIClient(api_key = os.environ.get('SENDGRID_API_KEY')) 4. To send an email, create the body and generate JSON representation. Refer to SendGrid’s complete code block: import sendgrid
import os
from sendgrid.helpers.mail import Mail, Email, To, Content

my_sg = sendgrid.SendGridAPIClient(api_key=os.environ.get('SENDGRID_API_KEY'))

# Change to your verified sender
from_email = Email("your_email@example.com")  

# Change to your recipient
to_email = To("destination@example.com")  

subject = "Lorem ipsum dolor sit amet"
content = Content("text/plain", "consectetur adipiscing elit")

mail = Mail(from_email, to_email, subject, content)

# Get a JSON-ready representation of the Mail object
mail_json = mail.get()

# Send an HTTP POST request to /mail/send
response = my_sg.client.mail.send.post(request_body=mail_json) Note that you can easily set up SendGrid and send up to 10,000 exclusive mail requests every second with your Django and Flask web applications. Tutorial: How to send emails using a multi-channel notifications service in Python If you’re looking to scale your application’s notification capabilities while keeping your codebase clean, you should consider a multichannel notifications service like Courier. Courier allows you to bring your own email provider, including support for SMTP and most popular transactional email APIs. I’ll walk you through setting up and sending notifications in the following steps. I’ll use the same SendGrid account that we set up in the prior tutorial. Courier 1. and navigate to the tab on the left. Sign up for Courier Designer 2. Click "Create Notification” Now you’re ready to integrate a provider for email. Courier supports direct integrations with several popular email providers such as SendGrid, Postmark, MailChimp Transactional, and more. For this tutorial, let’s go with SendGrid. 3. To integrate with the channel of your choice, click "+ Add Channel” Once you’ve added your configured SendGrid integration, you can start adding content. To design your notification, drag and drop the template blocks. You can also add custom code to your notification by overriding the entire email or adding a code block. If you decide to send your notification over another channel, you can reuse the same template blocks, and Courier will take care of updating the formatting. 5. With your Courier account configured, create a Python script. You can download via . Courier’s Python Package pip install trycourier 6. Once you’ve published your notification, Courier will automatically generate a code snippet for you to use. Copy-paste the code snippet and make an API call with the following script: from trycourier import Courier 

client = Courier(auth_token="Courier_Authentication_Token")

response = client.send( 
    event="your-notification-id" #Your notification ID from Courier 
    recipient="your-recipient-id" #Usually your system's User ID
    profile={ 
        "email": "user@example.com" #The recipient’s email address
    }, 
    data={ 
        "Loredm Ipsum": "dolor sit amet" #Tthe message you wish to send 
    }
)

print(response['messageId']) How to send emails with attachments in Python To include attachments in your email notifications, you can add an optional 'override' parameter as follows: from trycourier import Courier 

client = Courier(auth_token="Courier_Authentication_Token")

response = client.send( 
    event="your-event-id", 
    recipient="your-recipient-id", 
    profile={ 
        "email": "recipient_id",
        "phone_number": "recipient_number"
    }, 
    data={ 
        "Loredm Ipsum": "dolor sit amet" 
    },
    override={} #Pass the override here
)
print(response['messageId']) Pass the following override to the override parameter to equip your emails with attachment functionality: "override": {
    “channel”: {
      “email”: {
        "attachments": [
          {
            "filename": "sample_file.txt",
            "contentType": "text/plain",
            "data": "SGk="
          }
        ]
      }
    }
} Wrapping it up This article was essentially three tutorials in one, covering methods for sending emails with Python via SMTP, a transactional email service (SendGrid), and a multichannel notifications service (Courier). With basic Python knowledge, you should now be able to choose your preference among the three solutions and easily extend your web application’s functionality when it comes to transactional emails and notifications. Author: Milan Bhardwaj

How to Send Emails Using Python

There are many instances when you want to send an email each time a form is submitted. In this article, we demonstrate how to build two types of forms that send an email. We start by setting up a form that sends an email to a specific address as an alert each time the form is submitted successfully. Then we modify our code so that an email confirmation is sent to the user who filled out the form after it is submitted successfully. To send an email when a form is submitted we use: A standard Velo form Two backend functions to call a 3rd party service to send an email An event handler that runs when the dataset saves a new item and calls the backend functions Prerequisites This article assumes you are familiar with , , and . creating an input form web modules using backend functions to call 3rd party services You will also need an account with a 3rd party email delivery service. In the examples provided here we will be using as our email delivery service. You can use any email delivery service you like. The same overall concepts will apply. However, you will have to modify the code to fit your email delivery service's API. SendGrid Using SendGrid to send emails from certain email providers may not work as expected. For example, see about sending from Gmail addresses. Important: this notification Form First, we start by creating an input form with a submit button. You can use an existing form or create a new one. Either way, this is a regular input form without any special setup. Each input element is connected to a field in a dataset and a button is connected to the same dataset with the action. Submit In this example, we use a simple form with the following input elements: Backend Functions Next, in two backend files, we create two functions to call our 3rd party email delivery service. The first function adds the API key, sender address, and receiver address to the raw email data it receives and calls the second backend function. {sendWithService} ; { key = ; sender = ; recipient = ; sendWithService(key, sender, recipient, subject, body);
} //email.jsw import from 'backend/sendGrid' export ( ) function sendEmail subject, body const "QL.cFH5YHZQQ2_fG0z_KuQ.6WPTYEyjN1C3_7Wt9Hb3jGfkJNAyzJhz3ddhM" const "from.email@domain.com" const "to.email@domain.com" return You need to modify this function to contain your API key, the email address you want to send from, and the email address you want to send to. Important: Notice that we import the function from a file named . This is in a second backend file. The function packages up all the data it receives in the format expected by the email delivery service's API and then makes a call to the API. sendWithService sendGrid sendWithService {fetch} ; { url = ; headers = { : + key, : }; data = ; request = { : , : headers, : data
  }; fetch(url, request)
   .then( response.json());
} //sendGrid.js import from 'wix-fetch' export ( ) function sendWithService key, sender, recipient, subject, body const "https://api.sendgrid.com/api/mail.send.json" const "Authorization" "Bearer " "Content-Type" "application/x-www-form-urlencoded" const `from= &to= &subject= &text= ` ${sender} ${recipient} ${subject} ${body} const "method" "post" "headers" "body" return => response This example uses SendGrid as its 3rd party email delivery service. If you are using SendGrid, you can copy and paste this module without modifying it. If you are using a different service, you cannot use this module as is. You need to write a similar module to meet the format expected by your service's API and import that module from the module. Reminder: email.jsw Event Handler Finally, in the on the same page as the form, we add an event handler that runs each time a new item is successfully submitted. The event handler takes the values from the form to create the subject and the body of the email. That information is then passed along to the backend functions we wrote above. Page Code {sendEmail} ;

$w.onReady( {
  $w( ).onAfterSave(sendFormData);
}); { subject = ; body = ;
 
  sendEmail(subject, body)
    .then( .log(response)); 
} import from 'backend/email' ( ) function "#sportDataset" ( ) function sendFormData const `New Submission from ` ${$w( ).value} "#nameInput" const `Name: \rEmail: \rSport: \rComments: ` ${$w( ).value} "#nameInput" ${$w( ).value} "#emailInput" ${$w( ).value} "#sportDropdown" ${$w( ).value} "#commentsInput" => response console Our import statement assumes the backend web module was named . Modify the import statement to reflect the name of your backend web module. Note: email.jsw Modifying the Code The code we wrote above sends an email to the same address each time the form is submitted. It can easily be used as a basis for other common situations. For example, we will now modify the code so that the user submitting the form receives a confirmation email. Form The form does not need to be modified in any way. Backend Functions We'll add another modified version of the function that does not always call the function with the same address. Instead, we want the new function to get the address of the recipient from the form. sendEmail sendWithService In our new function, we need to add a parameter to the for the recipient's address. Since that address will be passed on to function, we no longer need the line that declared the hardcoded address we were using before. sendWithService So, with the new function added, our file now looks like this: {sendWithService} ; { key = ; sender = ; recipient = ; sendWithService(key, sender, recipient, subject, body);
} { key = ; sender = ; sendWithService(key, sender, recipient, subject, body);
} //email.jsw import from 'backend/sendGrid' export ( ) function sendEmail subject, body const "QL.cFH5YHZQQ2_fG0z_KuQ.6WPTYEyjN1C3_7Wt9Hb3jGfkJNAyzJhz3ddhM" const "from.email@domain.com" const "to.email@domain.com" return export ( ) function sendEmailWithRecipient subject, body, recipient const "QL.cFH5YHZQQ2_fG0z_KuQ.6WPTYEyjN1C3_7Wt9Hb3jGfkJNAyzJhz3ddhM" const "from.email@domain.com" return Event Handler We also need to modify the front-end code so that it imports the new function and uses it to send the email, specifying who the recipient is. {sendEmail, sendEmailWithRecipient} ;

$w.onReady( {
  $w( ).onAfterSave(sendFormData);
}); { subject = ; body = ; recipient = $w( ).value;
 
  sendEmailWithRecipient(subject, body, recipient)
    .then( .log(response)); 
} import from 'backend/email' ( ) function "#sportDataset" ( ) function sendFormData const `New Submission from ` ${$w( ).value} "#nameInput" const `Name: \rEmail: \rSport: \rComments: ` ${$w( ).value} "#nameInput" ${$w( ).value} "#emailInput" ${$w( ).value} "#sportDropdown" ${$w( ).value} "#commentsInput" const "#emailInput" => response console API List The following APIs are used in the code in this article. To learn more, see the . API Reference $w.Dropdown - Sets or gets a dropdown's value. $w.Dropdown.value $w.TextBox - Sets or gets a text box's value. $w.TextBox.value $w.TextInput - Sets or gets a text input's value. $w.TextInput.value wix-dataset - Adds an event handler that runs just after a dataset save. wix-dataset.onAfterSave( ) wix-fetch - Retrieves a specified resource from the network using HTTP / HTTPS. wix-fetch.fetch( ) Previously published at https://support.wix.com/en/article/velo-tutorial-sending-an-email-on-form-submission

Building Email Forms With Velo by Wix

How You Can Build TARS using Python: Virtual Assistant From Scratch   

Do you want to send emails in your application? Notifications, newsletters, promotions, there are so many reasons to send emails. After reading this article you’ll be able to send any sorts of emails from your Django application. There are many ways you can send emails using different email sending services. But in this guide, I’ll cover one of the most popular services, SES, or Simple Email Service. It has been developed by Amazon and can be used for free for up to 62000 emails per month. To work with SES we’ll use library. It is very easy to set up and use. [django-ses](https://github.com/django-ses/django-ses) But before we can start you need to… Sign up on AWS If you don’t already have an AWS account you need to get one. You simply won’t be able to use SES without it. To sign up you need to go to . the AWS sign up page Setting up I’m assuming you already have a Django project. To install library you need to run the following command django-ses pip install django-ses Once the library is installed you need to tell Django to use this library as email backend by adding the following line to your settings.py EMAIL_BACKEND = 'django_ses.SESBackend' Then you need to get credentials for SES Go to AWS Choose IAM service Add user Choose a name for the user and “Programmatic access” type (to get access key ID and secret access key) Attach permission AmazonSESFullAccess Create user After that, you should see “Access key ID” and “Secret access key”. Add them to like that settings.py AWS_ACCESS_KEY_ID = 'YOUR-ACCESS-KEY-ID'AWS_SECRET_ACCESS_KEY = 'YOUR-SECRET-ACCESS-KEY' Sending an email Now that we have all the credentials in place, we can send an email. We can do this using Django core functionality ( to be more specific). [django.core.mail.send_mail](https://docs.djangoproject.com/en/2.1/topics/email/) from django.core.mail import send_mailsend_mail('Subject here','Here is the message.',' ',[' ']) from@example.com to@example.com And this email should be sent using SES. So let’s jump into Django’s shell and try it out. python manage.py shell>>> from django.core.mail import send_mail>>> send_mail(...    'Subject here',...    'Here is the message.',...    ' ',...    [' ']...)boto.ses.exceptions.SESAddressNotVerifiedError: SESAddressNotVerifiedError: 400 Email address is not verified.<ErrorResponse xmlns=" "><Error><Type>Sender</Type><Code>MessageRejected</Code><Message>Email address is not verified. The following identities failed the check in region US-EAST-1: </Message></Error><RequestId>3966220a-3c6c-11e9-909d-889357e40867</RequestId></ErrorResponse> from@example.com to@example.com http://ses.amazonaws.com/doc/2010-12-01/ from@example.com Oh no! We got an error… Who would’ve thought that we couldn’t send emails from . Let’s fix this. from@example.com Sending emails from your personal email address To begin with, we can send an email from your personal email address. This should be pretty acceptable if you’re building an MVP. If you don’t want for everyone to see your personal email, you can create a separate email address for your application like . If people will start blocking your email for some reason, it will not affect your personal email health. your.application@gmail.com To send emails from your email address you need to Go to AWS Choose SES service Go to “Email Addresses” tab Click “Verify a New Email Address” Enter your email address of choice Go to the inbox for the email you’ve specified Confirm that you want to use your email in SES Once you’re done, you should be able to send an email from the Django shell >>>send_mail(...    'Subject here',...    'Here is the message.',...    ' ',...    [' ']...)1 your.application@gmail.com your.email.address+to.test@example.com After that, you should receive an email You might’ve noticed a number that has been returned by the method. This is the number of successfully sent emails, which in our case was 1. send_mail If we try to send an email to some address and it will fail then the failed email will not get counted >>> send_mail(...     'Subject here',...     'Here is the message.',...     ' ',...     [' ', ' ']... )1 your.application@gmail.com your.email.address+to.test@example.com not.existing.email.for.real.asdvsrg@gmail.com This call returned 1 because it could not send an email to the second address ( ) because it does not exist. I just made it up. send_mail not.existing.email.for.real.asdvsrg@gmail.com Sending emails from a custom domain Once your MVP is working and you have a domain for your application it’s time to send emails from this domain. To do this you need to add this domain to SES Go to AWS Choose SES service Go to the “Domains” tab Click “Verify a new domain” If you already have your domain on AWS Route53 then you just click through and your domain will be ready. If you have your domain set up somewhere else you need to follow specified instructions. Once you do follow the instructions correctly, you should see green verified status and the domain should be ready for sending emails via SES. We can go back to our Django shell and test sending emails from the new and shiny domain >>>send_mail(...    'Subject here',...    'Here is the message.',...    ' ',...    [' ']...)1 hello@yourdomain.com your.email.address+to.test@example.com Here’s your email Pretty neat, right? But it could be even more pretty… Custom name in the email Have you ever noticed a pretty email name? Something like this It even includes a link to unsubscribe. You can be so cool too. This is very easy. You just need to modify the sender name. Add a desired name in the beginning in double quotes and an email address the email will be sent from in the end in like this . <> ”Desired name” <email@example.com> >>>send_mail(...    'Subject here',...    'Here is the message.',...    '"Hello, you" < >',...    [' ']...)1 hello@yourdomain.com your.email.address+to.test@example.com Now you have a cool name too And it can be whatever you want it to. Conclusion Now you should know how to set up library django-ses use it to send emails set up emails in SES set up domains in SES make email sender info prettier This is the sixth part of a series of articles about the . Stay tuned for part 7. You can find , as well as my other projects, on my . Leave your comments down below and follow me if you liked this article. MuN the code of this project GitHub page Originally published at https://kholinlabs.com/the-easiest-way-to-send-emails-with-django on March 4, 2019.

The easiest way to send emails with Django (using SES from AWS)

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