Reliable Email Delivery for Your Application

Deliver the emails your users depend on with Sendzovo's transactional email infrastructure, built around authenticated sending, API and SMTP connectivity, and delivery-focused workflows.

What Is Email Delivery?

Email delivery is more than submitting an email from your application. A complete delivery workflow includes message submission, authentication, delivery attempts and the response from the recipient's mail system.

Your Application
  ↓
Sendzovo
  ↓
Authentication
  ↓
Delivery Attempt
  ↓
Recipient Mail System
  ↓
Delivered / Rejected / Failed

Email Delivery Without Building the Infrastructure

Your application should focus on your product instead of maintaining mail servers and delivery infrastructure. Sendzovo provides the email infrastructure between your application and your recipients.

Email API

Connect your application directly to Sendzovo over HTTPS and send transactional email programmatically.

Your App → Sendzovo API → Recipient
Explore Email API

SMTP Service

Use standard SMTP when your application, framework or existing email library already supports SMTP delivery.

Host: smtp.sendzovo.com
Port: 587
Security: STARTTLS
Explore SMTP

Authenticate Your Sending Domain

Configure your sending domain before sending production email. Authentication gives receiving mail systems signals they can use to verify that your messages are authorized.

SPF

Publish the required DNS configuration to identify authorized sending infrastructure for your domain.

DKIM

DKIM signing provides receiving systems with a mechanism to verify the authenticity of messages associated with your domain.

DMARC

Add a domain-level authentication policy that builds on SPF and DKIM and helps receiving systems handle authentication failures.

Domain Verification

Verify your DNS configuration before using the domain for production email sending.

Send From a Trusted Identity

Your sending identity is part of every email your application sends. Configure the appropriate sender information for your application and authenticated domain.

From Address

Define the address that recipients see as the sender of your transactional messages.

From Name

Use a recognizable sender name so users can quickly identify messages from your application.

Sending Domain

Use an authenticated domain that is configured for your email infrastructure.

Reply-To

Where supported, configure the address that should receive replies from your recipients.

Understand the Email Delivery Lifecycle

An API request is only the beginning. A message moves through several stages before the recipient's mail system accepts or rejects it.

1. Create the Message

Your application creates a transactional message containing the recipient, sender, subject and message content.

2. Submit the Message

Submit the message to Sendzovo through the Email API or SMTP service.

3. Process the Message

The message enters the email delivery workflow and is prepared for delivery to the recipient's mail system.

4. Attempt Delivery

The message is submitted to the recipient's mail infrastructure.

5. Receive the Result

The recipient's mail system may accept the message or return a delivery-related response.

6. Track the Activity

Delivery activity can be used to understand the outcome of your sending workflow and investigate problems.

Sending Is Only the Beginning

A successful API request does not necessarily mean the recipient has received the message. Separate submission from final delivery when designing your application workflow.

Send Request
  ↓
Accepted by Email Service
  ↓
Delivery Attempt
  ↓
Recipient Mail Server Response
  ↓
Delivered / Rejected / Failed

This distinction is important when your application needs reliable status information for password resets, account verification, receipts, notifications and other product-critical messages.

Track Delivery Activity

Delivery visibility helps you understand what happened after your application submitted an email.

Submitted

Your application successfully submitted the message to the email delivery service.

Delivered

The recipient's mail system accepted the message for delivery.

Bounced

The message could not be delivered to the recipient and a bounce response was received.

Failed

A delivery attempt encountered a failure that prevented successful delivery.

Important: Delivery Is Not Inbox Placement

Delivery generally means the recipient's mail system accepted the message. It does not guarantee that the email will appear in the primary inbox rather than spam, promotions or another mailbox location.

Connect Delivery Events to Your Application

When delivery event webhooks are enabled for your Sendzovo account, you can connect email activity to the workflows already running in your application.

Sendzovo
  ↓
Delivery Event
  ↓
Webhook
  ↓
Your Application
  ↓
Update Your Workflow

Handle Delivery Problems Responsibly

Repeatedly sending to addresses that cannot receive your messages can create unnecessary delivery problems. Use bounce and complaint information to make better sending decisions.

Bounces

Identify addresses where messages could not be delivered and investigate the reason for the failed delivery.

Complaints

Complaint activity can indicate that recipients do not want messages from a sender and should be treated carefully.

Suppression

Suppression workflows can help prevent future messages from being sent to addresses that should no longer receive them.

Investigate Problems

Delivery information gives your team useful context when investigating individual sending failures or recurring delivery issues.

Improve Sending Quality Before You Send

Some delivery problems start with the recipient address. Email verification helps you evaluate addresses before they enter an important sending workflow.

Email Verification

Evaluate addresses using available syntax, domain, MX, disposable and mailbox-related signals.

Risk Signals

Identify addresses that may require additional attention before sending.

Collect Address
  ↓
Verify Address
  ↓
Evaluate Result
  ↓
Store / Reject / Review
  ↓
Send Email

Built for Product-Critical Email

Send the messages your application needs to communicate important information to users.

Authentication Emails

Password resets, email verification, account activation and security notifications.

Product Notifications

Notify users about activity, events, changes and important actions inside your application.

Receipts & Confirmations

Deliver purchase confirmations, receipts, booking information and other transactional messages.

System Notifications

Send automated operational and application-generated messages from your backend systems.

Subscription Emails

Communicate subscription changes, account events and other service-related updates.

Business Applications

Power transactional email for SaaS products, ecommerce platforms, marketplaces and internal applications.

A Complete Email Delivery Workflow

Combine authentication, verification, sending and delivery monitoring into a workflow designed around reliable application email.

Your Application
  ↓
Email Verification
  ↓
Email API / SMTP
  ↓
Authenticated Sending Domain
  ↓
Email Delivery
  ↓
Delivery Activity
  ↓
Application Workflow

Why Build Your Email Delivery With Sendzovo?

Bring the essential pieces of application email together instead of maintaining separate systems for every part of your sending workflow.

API + SMTP

Choose a programmatic Email API or standard SMTP depending on how your application is built.

Domain Authentication

Configure your sending domain with the authentication records required by your email setup.

Email Verification

Evaluate recipient addresses before sending to reduce avoidable address-related problems.

Transactional Email

Build application workflows around password resets, notifications, receipts and other important messages.

Reusable Templates

Keep recurring transactional email content organized and separate from application logic.

Developer-Friendly Integration

Integrate email into your existing application stack without rebuilding your own email infrastructure.

Explore More Sendzovo Features

Build your email workflow with the Sendzovo features that fit your application.

Email API

Send transactional email directly from your application through HTTPS.

Learn More

SMTP

Connect existing applications and SMTP-compatible software to Sendzovo.

Learn More

Transactional Email

Send event-driven messages from your applications.

Learn More

Email Verification

Evaluate recipient addresses before sending.

Learn More

Email Templates

Organize reusable transactional email content.

Learn More

Frequently Asked Questions

Common questions about Sendzovo email delivery.

What is email delivery?

Email delivery is the process of transferring a message from your application or email service to the recipient's mail system.

What is the difference between sending and delivery?

Sending means submitting a message to the email service. Delivery refers to the recipient's mail system accepting that message.

Does Sendzovo support SMTP?

Yes. Sendzovo provides SMTP connectivity for applications, frameworks and existing SMTP-compatible software.

Does Sendzovo support an Email API?

Yes. Applications can integrate with Sendzovo through its Email API for programmatic transactional sending.

Why should I authenticate my sending domain?

Authentication helps receiving mail systems verify that your messages are authorized to use your sending domain.

Does successful delivery guarantee inbox placement?

No. Delivery generally means the recipient's mail system accepted the message. It does not guarantee primary inbox placement.

Can I verify email addresses before sending?

Yes. Sendzovo email verification can evaluate addresses before they enter your sending workflow.

What types of email can I send?

Sendzovo can be used for transactional messages such as authentication emails, notifications, confirmations, receipts and other application-generated email.

Build Your Email Delivery on Sendzovo

Send transactional email through API or SMTP while keeping domain authentication, verification and delivery workflows connected in one platform.