Send newsletters, product announcements, customer updates and other permission-based email campaigns with recipient management, email verification, personalization, suppression handling and delivery tracking.
Bulk email allows you to send the same campaign or message to a large group of recipients while managing recipient data, sending preferences and delivery outcomes.
Bulk email is commonly used for newsletters, product announcements, promotions, customer communications and other permission-based campaigns.
Instead of sending individual messages manually, your campaign can target a managed list of recipients through your email infrastructure.
Campaigns can use recipient information to personalize messages while still being delivered as part of a larger campaign.
Monitor delivery activity and identify bounces, rejected messages and other email events after your campaign is submitted.
Sendzovo supports different email workflows. Understanding the difference helps you choose the right sending method for each type of message.
Bulk email is generally campaign-oriented and is sent to a larger group of recipients.
Examples include newsletters, product announcements, marketing communications and customer updates.
Transactional email is normally triggered by an individual user action or application event.
Examples include password resets, account notifications, receipts and confirmations.
Build your campaign workflow around recipient quality, controlled sending and useful delivery information.
Organize recipients and keep campaign audiences separate from other email workflows.
Validate addresses before sending campaigns to help identify invalid and potentially risky recipients.
Create more relevant campaigns by using recipient information in your email content.
Keep bounced, complained and unsubscribed recipients out of future campaign sends where appropriate.
Monitor delivery activity and use events to understand what happened after your campaign was submitted.
Integrate bulk email workflows into your application using the Sendzovo Email API where supported.
A reliable bulk email workflow starts with recipient preparation and continues through delivery monitoring.
Use bulk email for permission-based communications where the same campaign needs to reach a larger audience.
Keep subscribers informed with regular newsletters, company updates and useful content.
Announce new products, features, improvements and important product updates.
Communicate planned changes, service information and other relevant customer updates.
Share educational content, guides and resources with subscribers and customers.
Send invitations, reminders and follow-up campaigns to event subscribers.
Send promotional campaigns to recipients who have opted in to receive the relevant communications.
Good bulk email starts with clean and well-organized recipient data.
Bring recipient data into your campaign workflow from the systems and applications where your customer data is maintained.
Keep different customer groups and campaign audiences organized so messages can be sent to the appropriate recipients.
Keep recipient information accurate and remove addresses that should no longer receive campaigns.
Maintain unsubscribe and suppression information alongside recipient records so campaign workflows can respect sending preferences.
Sending campaigns to invalid or poor-quality addresses can result in unnecessary delivery failures. Use email verification as part of your list preparation workflow.
Identify addresses that are unlikely to receive messages before adding them to a campaign send.
Use verification results to maintain cleaner recipient lists over time.
Verification can help identify disposable domains and other recipient characteristics that may require additional consideration.
Integrate verification into your application's recipient-import and campaign preparation workflow.
Organize recipients into meaningful audiences so each campaign is sent to the people it is intended for.
Separate audiences based on customer attributes, subscription status or other information maintained by your application.
Target campaigns based on the products, services or topics recipients have chosen to receive.
Use campaign activity and recipient engagement information to improve future audience selection.
Build different campaign content for different recipient groups instead of sending the same message to every subscriber.
Use recipient data to make campaign messages more relevant while maintaining a consistent campaign structure.
Personalize greetings and campaign content using recipient information.
Include company or account information where it is relevant to the recipient and campaign.
Use campaign-specific fields to customize content for different audiences.
Use sensible fallback content when optional recipient information is not available.
Bulk email should provide recipients with a clear way to stop receiving campaign messages and should respect their preferences in future sends.
Campaign emails should provide an understandable mechanism for recipients to unsubscribe from the relevant communications.
Once a recipient unsubscribes, update the recipient status so future campaign workflows can respect that preference.
Keep unsubscribed recipients out of future campaigns where the unsubscribe applies.
Treat recipient preferences as an important part of your campaign data and sending workflow.
Suppression management helps prevent repeatedly sending campaigns to recipients who should no longer receive them.
Track addresses associated with permanent delivery failures and prevent unnecessary future sends.
Respect recipients who have opted out of the relevant campaign communications.
Use complaint-related events as part of your suppression and recipient-management workflow.
Suppress individual addresses when your business workflow requires a recipient to stop receiving specific campaign messages.
Build campaigns using standard email formats supported by your application and Sendzovo email infrastructure.
Create visually rich campaign emails using HTML templates designed for email clients.
Provide a plain-text version of campaign content where appropriate for accessibility and compatibility.
Build reusable campaign layouts for newsletters, announcements and recurring communications.
Combine reusable templates with recipient data to create personalized campaign messages.
Configure your sending domain before sending production campaigns. Authentication allows receiving mail systems to verify that messages are authorized for your domain.
Configure the required SPF record for your sending domain and email infrastructure.
Publish the DKIM records provided by Sendzovo to authenticate outgoing email.
Configure DMARC to define how receiving systems should handle authentication failures and help protect your domain from spoofing.
Use sender addresses associated with your authenticated sending domain.
Combine verification, recipient management and suppression handling before sending your campaign.
Monitor what happens after your campaign is submitted and use delivery events to improve future campaigns.
Monitor delivery outcomes and identify messages that were delivered, deferred, bounced or rejected.
Identify permanent and temporary delivery failures so recipient data can be maintained.
Review email activity to understand how your campaigns are progressing through the delivery workflow.
Use webhooks and delivery events to update your own systems automatically.
Use webhooks to send email events back to your application and automate recipient-management workflows.
If your application manages customers, subscribers or campaigns, you can integrate email sending directly into your own software.
curl -X POST https://api.sendzovo.com/v1/email \
-H "Authorization: Bearer YOUR_SENDZOVO_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"from": "newsletter@example.com",
"to": ["customer@example.com"],
"subject": "Product Update",
"html": "<h1>What's New</h1><p>Here is our latest update.</p>"
}'const response = await fetch(
'https://api.sendzovo.com/v1/email',
{
method: 'POST',
headers: {
'Authorization': `Bearer ${process.env.SENDZOVO_API_KEY}`,
'Content-Type': 'application/json'
},
body: JSON.stringify({
from: 'newsletter@example.com',
to: ['customer@example.com'],
subject: 'Product Update',
html: `<h1>What's New</h1><p>Here is our latest update.</p>`
})
}
);
const result = await response.json();import os
import requests
response = requests.post(
'https://api.sendzovo.com/v1/email',
headers={
'Authorization': f"Bearer {os.environ['SENDZOVO_API_KEY']}",
'Content-Type': 'application/json'
},
json={
'from': 'newsletter@example.com',
'to': ['customer@example.com'],
'subject': 'Product Update',
'html': (
'<h1>What\'s New</h1>'
'<p>Here is our latest update.</p>'
)
}
)
print(response.json())$response = Http::withToken(env('SENDZOVO_API_KEY'))->post(
'https://api.sendzovo.com/v1/email',
[
'from' => 'newsletter@example.com',
'to' => ['customer@example.com'],
'subject' => 'Product Update',
'html' => '<h1>What\'s New</h1><p>Here is our latest update.</p>',
]
);
$result = $response->json();using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;
using var client = new HttpClient();
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue(
"Bearer",
Environment.GetEnvironmentVariable("SENDZOVO_API_KEY")
);
var payload = new
{
from = "newsletter@example.com",
to = new[] { "customer@example.com" },
subject = "Product Update",
html = "<h1>What's New</h1><p>Here is our latest update.</p>"
};
var content = new StringContent(
JsonSerializer.Serialize(payload),
Encoding.UTF8,
"application/json"
);
var response = await client.PostAsync(
"https://api.sendzovo.com/v1/email",
content
);Use the API approach when your application needs to control recipient selection, campaign content or sending workflows programmatically.
Campaign workflows can be designed around the timing and audience appropriate for your communication.
Prepare your recipient list, email content and verification results before the campaign is sent.
Structure your application so campaigns are sent according to your account limits and operational requirements.
Choose an appropriate sending window for your audience and campaign type.
Review delivery events after the campaign begins so problems can be identified quickly.
Bulk email quality depends on more than simply sending messages. Recipient data, authentication and sending practices all matter.
Send campaign email to recipients who have a valid reason to receive the communication and have provided appropriate permission where required.
Validate addresses before adding them to campaign sends to reduce avoidable delivery failures.
Configure SPF, DKIM and DMARC for your sending domain before production campaign sending.
Process unsubscribe requests promptly and keep suppressed recipients out of applicable campaigns.
Review permanent delivery failures and keep your recipient data up to date.
Maintain good list hygiene and responsible sending practices to support long-term email deliverability.
Bulk email sending may be subject to account, plan, rate and infrastructure limits.
Campaign sending may be subject to rate limits depending on your account and sending configuration.
Your plan may determine how much email you can send during a particular billing period.
Campaign or API requests may have recipient limits depending on your Sendzovo configuration.
Sending controls may be applied to protect your account and the email delivery infrastructure.
Check your current Sendzovo plan and account documentation for the limits that apply to your campaign workflow.
Your API credentials, recipient data and campaign infrastructure should be protected like other production application resources.
Store API credentials securely and never expose private keys in browser-side JavaScript.
Keep API keys and other sensitive configuration outside your source code.
Give campaign-management access only to people and systems that need it.
Handle recipient information responsibly and limit access to campaign data.
Review your campaign workflow before sending to a production audience.
Sendzovo can fit into your application's complete bulk email workflow from list preparation through delivery monitoring.
Common questions about using Sendzovo for bulk email campaigns.
Bulk email is the process of sending an email campaign or message to a large group of recipients. It is commonly used for newsletters, product announcements, customer communications and other permission-based campaigns.
No. Transactional email is generally triggered by an individual user or system event, while bulk email generally involves sending a campaign to a larger group of recipients.
Yes. Email verification can be used before sending campaigns to identify invalid, disposable or risky addresses.
Yes. Campaigns can use recipient information to personalize content such as names, company information and other campaign-specific fields.
Yes. Campaign emails should provide recipients with a clear way to unsubscribe from the relevant communications and your application should respect those preferences.
Yes. Suppression workflows can be used to prevent bounced, complained or unsubscribed recipients from receiving applicable future campaigns.
Yes. Delivery events can help you monitor messages that are delivered, deferred, bounced or rejected.
Yes. You can build campaign and recipient workflows into your application using the Sendzovo Email API where supported by your account.
Build your campaign workflow around clean recipient data, verified addresses, responsible sending and delivery monitoring with Sendzovo.
Combine bulk email with verification, transactional delivery, APIs and other email infrastructure.
Verify recipient addresses before sending campaigns to reduce invalid and risky email addresses.
Explore Email Verification →Send password resets, confirmations, notifications and other event-driven messages.
Explore Transactional Email →Integrate email sending directly into your application using a modern HTTP API.
Explore Email API →Connect existing applications and SMTP-compatible software to Sendzovo.
Explore SMTP →Authenticate your sending domain using DNS-based email authentication.
Explore Domain Authentication →Receive delivery events in your application and automate campaign workflows.
Explore Webhooks →Separate transactional and bulk email traffic into dedicated streams for better organization and control.
This feature is currently under development.