Description

The Mailersend addon connects Newsletter to the MailerSend delivery service via API, routing all platform sends through the provider’s SMTP servers to improve inbox deliverability. Configuration requires only the API key and the verified domain in the MailerSend dashboard, enabling open, click, and bounce tracking directly in Newsletter statistics.

Key Features

  • Delivery via MailerSend API
    Replaces Newsletter’s standard sending with MailerSend’s transactional endpoint.
  • API key configuration
    A dedicated dashboard requests a token and verified domain, eliminating manual SMTP adjustments.
  • Bounce and reply tracking
    Synchronizes provider feedback with the subscriber list, automatically marking invalid addresses.
  • Compatibility with Newsletter queues
    Respects the plugin’s internal scheduler, controlling speed according to the account limit.
  • Support for campaigns and automated messages
    Routes newsletters, autoresponders, and transactional emails through the same sending channel.

Mailersend Benefits

  • Better deliverability
    Reduces spam risk by using specialized infrastructure with authenticated IPs.
  • Cleaner lists
    Provider feedback keeps the database healthy without manual cleanup work.
  • Scale without your own server
    Allows large volumes to be sent without relying on WordPress hosting.
  • Sending visibility
    Detailed metrics help diagnose drops in opens and adjust campaigns.

Who Is It For?

  • Newsletter publishers experiencing lower deliverability when sending directly through the server.
  • Agencies and marketing professionals managing large lists with high monthly volume.
  • Stores and content portals that need to separate transactional traffic from standard WordPress sending.

Ideal for those who take email marketing seriously and need a dedicated delivery route, the addon positions Newsletter as the editorial front end and delegates the critical sending infrastructure to MailerSend. The result is a predictable operation, with clear bounce and open metrics, capable of supporting recurring campaigns without overloading the website server.

Frequently asked questions

Is Newsletter Mailersend GPL-licensed?

Yes. Newsletter Mailersend is distributed under the GPL (GNU General Public License). You may legally use, modify and redistribute it on as many sites as you want.

Can I use Newsletter Mailersend on multiple sites?

Yes. You can install Newsletter Mailersend on as many sites as you want. Only automatic updates through Ultrapack Auto Updater have a limit: from 3 to 80 sites, depending on the plan.

How much does Newsletter Mailersend cost at Ultrapack?

Newsletter Mailersend costs US$2.99 as a single purchase, and it is also included in the subscription plans starting at US$12/mo (VIP I).

Does Newsletter Mailersend include updates?

Yes. The current version of Newsletter Mailersend is 1.2.3, published at Ultrapack on Aug 30, 2026. Subscribers update straight from the WordPress dashboard with UAU (Ultrapack Auto Updater).

Is Newsletter Mailersend scanned before publication?

Yes. Every version of Newsletter Mailersend goes through a malware scan (ClamAV and YARA rules, at UltraHub) before it is published.