Email Verification for Transactional Emails: Boost Deliverability & Reduce Bounces

1import httpx
2 
3api_key = "YOUR_API_KEY"
4to_email = "user@example.com" # This could be an invalid email without verification
5 
6response = httpx.post(
7    "https://api.piisend.com/api/v1/emails",
8    headers={
9        "Authorization": f"Bearer {api_key}",
10        "Content-Type": "application/json"
11    },
12    json={
13        "to": [to_email],
14        "subject": "Your Order Confirmation",
15        "html": "<h1>Thank you for your order!</h1><p>Your order #12345 has been placed.</p>",
16        "text": "Thank you for your order! Your order #12345 has been placed."
17    }
18)
19 
20if response.status_code == 200:
21    print("Email sent successfully!")
22else:
23    print(f"Failed to send email: {response.status_code} - {response.text}")

1async function sendVerifiedEmail(recipientEmail, subject, htmlContent, textContent) {
2  // Simulate an email verification API call
3  // In a real application, you would call a third-party service here
4  const isEmailValid = await simulateEmailVerification(recipientEmail);
5 
6  if (!isEmailValid) {
7    console.log(`Email ${recipientEmail} is invalid. Skipping send.`);
8    return;
9  }
10 
11  const piisendApiKey = "YOUR_API_KEY";
12  const response = await fetch("https://api.piisend.com/api/v1/emails", {
13    method: "POST",
14    headers: {
15      "Authorization": `Bearer ${piisendApiKey}`,
16      "Content-Type": "application/json"
17    },
18    body: JSON.stringify({
19      to: [recipientEmail],
20      subject: subject,
21      html: htmlContent,
22      text: textContent
23    })
24  });
25 
26  if (response.ok) {
27    console.log("Email sent successfully after verification!");
28  } else {
29    const errorData = await response.json();
30    console.error(`Failed to send email: ${response.status} - ${JSON.stringify(errorData)}`);
31  }
32}
33 
34// Dummy function to simulate verification
35async function simulateEmailVerification(email) {
36  // Replace with actual API call to an email verification service
37  console.log(`Verifying email: ${email}...`);
38  await new Promise(resolve => setTimeout(resolve, 500)); // Simulate network delay
39  // For demonstration, let's say 'bad@example.com' is invalid
40  return !email.includes("bad@example.com");
41}
42 
43// Example usage:
44sendVerifiedEmail(
45  "valid@example.com",
46  "Welcome to Piisend!",
47  "<h1>Welcome!</h1><p>Thanks for signing up.</p>",
48  "Welcome! Thanks for signing up."
49);
50 
51sendVerifiedEmail(
52  "bad@example.com",
53  "Welcome to Piisend!",
54  "<h1>Welcome!</h1><p>Thanks for signing up.</p>",
55  "Welcome! Thanks for signing up."
56);