Mailgun to UniOne Migration: The Ultimate Guide

Switching email providers might sound complicated, yet migrating from Mailgun to UniOne can be smooth and predictable when approached step by step. Whether you're moving for better pricing, more responsive support, or advanced features, this guide will walk you through the entire process.
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Benefits of Switching from Mailgun to UniOne

Many teams decide to switch from Mailgun to UniOne for several practical reasons:

UNIONE
Transparent Pricing With UniOne, all features are available on every pricing plan. From a 4-month free trial that includes 6,000 emails per month to enterprise-level plans with optimized per-1,000-email rates, you can save up to 40% on sending costs without hidden limitations.
Proven Deliverability UniOne ensures strong deliverability through proactive IP management and adherence to industry best practices. Our 24/7 support team is always available to assist with domain configuration, authentication, and reputation management to help you achieve the best possible sending results.
Easy Management UniOne’s “Projects” feature makes domain configuration, reputation management, and traffic distribution simple and flexible. Easily manage campaigns across different use cases, regions, industries, or clients – all within a single account. Ideal for developers, enterprises, agencies, and white-label resellers.
Email Validation Email validation is included in all pricing plans. Free verification credits allow you to test our email validation API at no additional cost and add an extra layer of protection to your subscription or sign-up forms.
Reachable Support Tired of waiting 2–3 business days for a ticket response? With UniOne, you receive live chat responses in as little as 10 minutes. Our friendly support team monitors requests 24/7. Prefer email? You’ll receive a reply faster than it takes to brew and enjoy a cup of coffee.
Transparent Pricing
UNIONE With UniOne, all features are available on every pricing plan. From a 4-month free trial that includes 6,000 emails per month to enterprise-level plans with optimized per-1,000-email rates, you can save up to 40% on sending costs without hidden limitations.
Proven Deliverability
UNIONE UniOne ensures strong deliverability through proactive IP management and adherence to industry best practices. Our 24/7 support team is always available to assist with domain configuration, authentication, and reputation management to help you achieve the best possible sending results.
Easy Management
UNIONE UniOne’s “Projects” feature makes domain configuration, reputation management, and traffic distribution simple and flexible. Easily manage campaigns across different use cases, regions, industries, or clients – all within a single account. Ideal for developers, enterprises, agencies, and white-label resellers.
Email Validation
UNIONE Email validation is included in all pricing plans. Free verification credits allow you to test our email validation API at no additional cost and add an extra layer of protection to your subscription or sign-up forms.
Reachable Support
UNIONE Tired of waiting 2–3 business days for a ticket response? With UniOne, you receive live chat responses in as little as 10 minutes. Our friendly support team monitors requests 24/7. Prefer email? You’ll receive a reply faster than it takes to brew and enjoy a cup of coffee.

Migration Preparation Steps

Review Your Existing Mailgun Configuration
Create a checklist of your current setup, including sending domains, SMTP credentials, API endpoints, webhook settings, templates, routing logic, and other relevant details, to accurately replicate your configuration in UniOne.
Secure and Export Your Essential Data
Export the following from Mailgun: email templates, suppression lists, analytics reports (if needed) to speed up the transition and simplify setup within UniOne.
Prepare for Domain Authentication
You’ll need to update DNS records to authorize UniOne as your new email sending provider. Make sure you have access to your DNS settings – or coordinate with the person who does.

Migration Workflow: Step by Step

Getting started with UniOne is simple – most users complete the initial setup in under 30 minutes.

Create Your Account 

Сreate your account at unione | UniOne Sign up for UniOne and activate your account. You can begin testing immediately using the Sandbox domain before completing full DNS verification.

Verify Domains in UniOne 

Add your sending domain and complete the verification by updating the required DNS records:

Verify your domain | UniOne

Proper domain verification is essential for maintaining deliverability during your migration. 

Configure Email Sending via UniOne SMTP 

To migrate SMTP sending:

These steps ensure a seamless SMTP transition with minimal downtime.

Configure Email Sending via UniOne API 

For email API migration, update:

UniOne’s REST API is developer-friendly and supports all major programming languages. Webhooks are available for real-time event tracking, similar to Mailgun.

Recreate Your Templates

Import your exported templates into UniOne’s template editor or rebuild them using the built-in email builder. For dynamic content, UniOne supports Simple, Velocity, and Liquid template engines for flexible personalization. 

recreate emailtemplates | UniOne

Test Before the Full Switch

We recommend running both platforms in parallel for a short period. Gradually route a small percentage of traffic through UniOne to verify deliverability and configuration accuracy before completing the migration. 

Account Permissions & Administration

UniOne offers flexible access controls for teams. You can:

• Assign user roles
• Manage multiple sending projects
• Restrict API access using IP filtering

This ensures full control over configurations and sending activity during and after migration.

FAQ

Can I keep my current sending IP addresses after migration?
In most cases, IPs are provider-owned. However, UniOne offers dedicated IP options if you require an isolated sending reputation.
How to set up UniOne SMTP for reliable email delivery?
Update your SMTP host, credentials, and port settings. Enable TLS and make sure DNS verification is complete before scaling traffic. Test your connection using the free SMTP Debug Tool to review detailed logs and identify potential issues.
How to monitor email performance after switching?
Use UniOne’s real-time event history logs, webhooks, and dashboards for analytics (such as Delivery, Non-delivery, and Performance Reports) to monitor delivery statuses, opens, clicks, and engagement metrics on visual charts, or use event-dump API methods to obtain the data in the CSV format.
Are there tools to help with bulk contact import?
As an API-first email platform, UniOne does not provide built-in contact storage. However, transferring your suppression data from your previous provider is strongly recommended and can be easily done using UniOne’s suppression API methods.
How to migrate from Mailgun to UniOne without downtime?
Run both platforms simultaneously during the transition. Gradually redirect traffic to UniOne after verifying DNS settings and authentication.

Need Professional Migration Assistance?

If you’d prefer expert support during your Mailgun to UniOne migration, our team is available 24/7 to guide you through every step — from DNS verification to API integration.

We’ll help you switch smoothly, securely, and without unnecessary disruption.

In the meantime, take advantage of our 4-month free trial, which includes 6,000 monthly email credits — giving you plenty of room to test and transition with confidence.
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