turboSMTP

What is turboSMTP?

turboSMTP is an SMTP relay service designed to help businesses, developers, and marketers send emails — both transactional and marketing — with high deliverability rates and full infrastructure control. The platform has been operating since 2010 and the vendor states it currently serves over 100,000 customers worldwide, including enterprise clients across manufacturing, hospitality, and technology sectors.

Its core use case is as an outgoing mail server relay, replacing unreliable default SMTP configurations (e.g., from ISPs or shared hosting) with a dedicated, authenticated sending infrastructure. It supports both transactional emails (order confirmations, password resets, notifications) and bulk newsletter campaigns.

Key Features

Deliverability – turboSMTP uses whitelisted, ISP-trusted servers with dedicated IP addresses distributed across Europe, the USA, the Middle East, and Asia, achieving inbox delivery rates significantly above standard free SMTP options.
Smart Routing – An adaptive routing system dynamically optimizes sending paths to maximize inbox placement and overall campaign performance.
Real-Time Tracking – Open and click tracking is available in real time, giving senders precise visibility into recipient behavior. Scheduled activity reports can be delivered to users' inboxes on a daily, weekly, or monthly basis.
Email Validation Tool – A built-in contact database screening tool identifies invalid, non-existent, or potentially harmful addresses before sending, reducing bounce rates and protecting sender reputation.
Bounce, Spam & Unsubscribe Management – The platform automatically handles soft and hard bounces, spam complaints, and unsubscribe requests.
Custom Tracking Domain – Users can configure a custom domain for tracking links, improving deliverability metrics and maintaining brand consistency.
Event Webhooks – Real-time webhook notifications allow developers to capture and respond to email events (delivery, open, click, bounce) programmatically.
API & SDK Access – A REST API and multi-language SDKs enable developers to integrate email sending directly into web applications, CRMs, and e-commerce platforms. A free WordPress SMTP plugin is also available.
Sub-Account & White Label System – Agencies and resellers can create sub-accounts to split relay capacity across clients or teams, with white-label options available.
Compatibility – turboSMTP works with all major mail clients and platforms, including Mozilla Thunderbird, Windows Mail, SendBlaster, and GroupMail.
Compliance & Security All infrastructure is fully GDPR-compliant, with server locations in Europe and other regions to meet local data protection regulations. An anti-spam policy governs platform use.

Pricing A free tier is available with 6,000 emails per month (no credit card required). Paid plans are offered both as monthly subscriptions and pay-as-you-go packages, scaling based on sending volume. A 15-day or 100-email money-back guarantee applies to paid plans.

Support Customer support is available 24/7/365 via phone, live chat, and ticket system, and is offered in multiple languages.