Description

The SMTP2GO addon connects the Newsletter to the SMTP2GO transactional delivery service via API, routing each send from the plugin through the provider’s authenticated servers with SPF, DKIM, and DMARC already configured. Designed for sites that send large volumes of campaigns and newsletters, it keeps the inbox as the default destination by bypassing hosting server limits and common anti-spam filters.

Key Features

  • SMTP2GO API Connection
    Authenticates the sending with the API key from the account registered with the provider.
  • Native Integration with the Newsletter
    Adds a new delivery method in the base plugin’s settings panel.
  • Campaign and message routing
    Directs newsletters, tests, and transactional emails through SMTP2GO’s infrastructure.
  • Support for domain authentication
    Leverages SPF, DKIM, and DMARC already applied to the verified sender of the account.
  • Simple admin setup
    Enables the service in a few fields without editing WordPress files.

Benefits of SMTP2GO

  • Higher delivery rate
    Reduces the chance of messages landing in spam or being blocked by the destination provider.
  • Independence from the hosting server
    Bypasses sending limits imposed by shared hosting or a VPS.
  • Scales for large lists
    Supports high-volume sends without bogging down the site’s cron process.
  • Sender reputation preserved
    Keeps the IP of your own server out of blacklists by outsourcing delivery.

Who Is It For?

  • Content editors and portals that send recurring newsletters to growing lists.
  • Online stores and businesses that need to ensure delivery of promotional campaigns.
  • Administrators dealing with sending limits on hosting and who want to move to a dedicated SMTP.

For those who run the Newsletter as the central communication channel, the component solves the most fragile point in the workflow: effective delivery to the inbox. By delegating transport to SMTP2GO, the site keeps editorial control in WordPress while gaining the infrastructure of a specialized provider, with an authenticated domain and reputation monitoring.

Frequently asked questions

Is Newsletter SMTP2GO GPL-licensed?

Yes. Newsletter SMTP2GO 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 SMTP2GO on multiple sites?

Yes. You can install Newsletter SMTP2GO 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 SMTP2GO cost at Ultrapack?

Newsletter SMTP2GO 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 SMTP2GO include updates?

Yes. The current version of Newsletter SMTP2GO is 1.2.8, published at Ultrapack on Aug 29, 2026. Subscribers update straight from the WordPress dashboard with UAU (Ultrapack Auto Updater).

Is Newsletter SMTP2GO scanned before publication?

Yes. Every version of Newsletter SMTP2GO goes through a malware scan (ClamAV and YARA rules, at UltraHub) before it is published.

What are the requirements for the plugin Newsletter SMTP2GO?

Requires WordPress 6.1 or higher and PHP 7.0 or higher. Tested up to WordPress 7.1.