Advanced Email Validation using ApyHub’s API in NodeJS

• It can help detect syntax errors, typos, and invalid email addresses that can cause email delivery failures
• Network issues and over-aggressive blacklists can also result in email delivery failures, but email validation can help ensure reliable email delivery
• By implementing email validation, businesses can ensure that their email campaigns reach their intended recipients, improve their sender reputation, and maintain a positive brand image
• Additionally, email validation can help prevent potential data breaches and protect sensitive information that could be compromised through fraudulent emails

How does it work?

1. Syntax check: The API first checks the syntax of the email address to ensure that it conforms to the standard format. This includes checking for missing "@" or "." symbols and ensuring that the address does not contain any invalid characters.
2. Standard Response: The API is a RESTful API that delivers data in JSON format.
3. Domain verification: The API then verifies the email address domain by checking its DNS records. This helps ensure that the domain is valid and active and can receive email.
4. Spam trap and disposable email check: Finally, the API checks the email address against known spam traps and disposable email address providers. This helps prevent fraudulent or invalid email addresses from being used. This list gets updated from a wide variety of sources daily basis to make sure you get the most up-to-date and accurate information to protect your system from potential threats related to spam and fraud.

Quick tutorial

Prerequisites

• Node.js v16+
• An ApyHub account
• Git CLI

1. To get started with ApyHub you first need to register for a free account to get an API Key (apy-token). You can use Google Authentication or GitHub Authentication as well.

2. Clone the starter project from the repository:

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git clone https://github.com/iamspathan/apyhub-email-validation-tutorial.git

3. Install dependencies

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npm install

4. Add your Secret APY-TOKEN in server.js

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app.post('/signup', async (req, res) => {
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  try {
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    const { email, password } = req.body;
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    //validate email using ApyHub API
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    const response = await axios.post('https://api.apyhub.com/validate/email/dns', { email }, {
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      headers: {
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        'apy-token': 'ADD-YOUR-APY-TOKEN-HERE',
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        'Content-Type': 'application/json'
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      }
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    });
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    if (!response.data.data) {
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      return res.status(400).json({ message: 'Invalid email address' });
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    }
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    // Check if user already exists
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    const user = users.find(u => u.email === email);
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    if (user) {
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      return res.status(409).json({ message: 'User already exists' });
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    }
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    // Hash password
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    const saltRounds = 10;
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    const hashedPassword = await bcrypt.hash(password, saltRounds);
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    // Save user
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    users.push({ email, password: hashedPassword });
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    res.status(201).json({ message: 'User created' });
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  } catch (err) {
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    console.error(err);
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    res.status(500).json({ message: 'Internal server error' });
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  }
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});

5. Start the app

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node server.js

6. Finally, Navigate to http://localhost:3000, You will able to see the Signup page.

Use Cases:

1. Bulk email verification: Enterprises may have large email lists that need to be validated for accuracy and deliverability. An email validation API can be used to check the validity of each email address in the list, ensuring that emails are sent only to valid addresses.
2. Fraud prevention: Email validation APIs can also be used to detect fraudulent email addresses used in phishing attacks, preventing unauthorised access to enterprise systems.
3. Marketing campaigns: Email validation APIs can help enterprises ensure that their marketing emails reach the intended recipients by verifying the email addresses in their lists and removing invalid addresses.
4. Compliance: Email validation APIs can help enterprises comply with data protection regulations by ensuring that emails are sent only to users who have provided valid consent.
5. Customer support: Email validation APIs can be used to verify the email addresses of customers who submit support requests, ensuring that the enterprise is communicating with the correct customer.