News & updates

A fire at the NorthC Amsterdam 03 data centre in Almere, where IBM Italia hosts the infrastructure that turboSMTP relies on, caused a major outage of the sending service and a multi-day degradation of ancillary services. No data was lost or compromised: the incident was a temporary loss of availability, with all customer data intact and inaccessible only during the recovery window. Core sending was fully restored within 48 hours from the Frankfurt failover data centre.

A preliminary technical incident report has been published. As required under GDPR (Art. 28), the incident was formally classified as a temporary loss of data availability, with no breach of confidentiality or integrity.

turboSMTP joined GITEX Global 2025 in Dubai to meet innovators, startups and enterprises from across the region and talk about the future of email performance — high-speed delivery, secure infrastructure, and solutions that scale from the first message to millions. A limited number of free passes were offered to customers and prospects who wanted to connect with the team on site.

The official turboSMTP app is now live in the Zapier ecosystem. Two actions are available at launch: Send Email, to send transactional and automated messages directly from a Zap (connecting Google Sheets, CRMs, forms and any other Zapier-compatible app), and Find Email Status, which uses the message ID to retrieve delivery, opens, clicks and bounces — enabling workflows such as automatic cleanup of bounced addresses or follow-ups when a message is not opened. Triggers (e.g. when an email is opened) and additional actions are planned in upcoming releases.

The sub-account option, previously reserved for higher-tier plans, is now available to Basic plan customers as well. Sub-accounts allow a main account to provision and manage separate sending identities — each with its own credentials, quota and reporting — making it easier for agencies, resellers and teams to keep traffic segmented under a single billing relationship.

The Smart Routing feature is now available free of charge to all turboSMTP accounts. Smart Routing randomises delivery attempts across multiple IPs to absorb temporary deferrals automatically, and lets senders define per-domain routing rules — for example, shifting traffic to specific recipient domains onto IPs with a better reputation, with changes taking effect instantly. The feature can be enabled by contacting the support team.

A new WordPress plugin, Pro Mail SMTP, is now available to improve email deliverability on WordPress sites. Beyond standard SMTP authentication, the plugin supports multiple providers with automatic failover, smart routing rules per email type, detailed logging of outgoing messages and proactive failure alerts via Slack, Discord, Microsoft Teams or custom webhooks. It is compatible with all major contact form plugins (Contact Form 7, WPForms, Gravity Forms) and complements the existing turboSMTP WordPress plugin for sites that need a more flexible, multi-provider setup.

To comply with modern infrastructure security standards, turboSMTP has completed the transition to mandatory API Keys for all new SMTP integrations, external mail clients, and web plugins, deprecating the use of the primary account password for relay connections.

Under this system, connections can no longer be established using the account’s master login password. Senders must generate a cryptographic pair from their dashboard: the Consumer Key (which replaces the SMTP Username/Email) and the Consumer Secret (which replaces the SMTP Password). This enforcement isolates sending nodes from account billing settings, prevents brute-force exploits, and allows administrators to revoke or rotate individual keys instantly without changing the master account credentials.

As of mid-2025, first-time dashboard logins are automatically prompted to generate their initial API Keys immediately to clear connection blocks on external clients like Thunderbird, Outlook, and WordPress environments.

As an increasing number of email infrastructure providers replace their support teams with AI chatbots and automated triage agents, turboSMTP confirms its long-standing commitment: every support interaction is handled by a real person. No LLM-based chatbots, no automated AI agents, no scripted bot deflection — across all three channels (email, live chat and phone) and 24/7.

This is a deliberate choice, not a missing feature. Email deliverability problems are rarely solved by pattern matching: they involve domain reputation, ISP-specific rules, DNS configuration, list hygiene and contextual judgement that automated systems cannot reliably replicate. The team has been further reinforced in early 2025 with additional second-line specialists and continuous training on deliverability, authentication standards and recipient-side policies.

turboSMTP is now more than a professional SMTP relay: the new integrated Email Marketing Tool turns the platform into a complete marketing suite. Campaigns can be designed, automated and analysed directly inside the turboSMTP account, without third-party integrations or extra subscriptions.

The tool ships with a drag-and-drop responsive editor with ready-made templates, contact list management with custom fields and segmentation, single and double opt-in signup forms, visual marketing automation flows (welcome sequences, lead nurturing, cart recovery and similar workflows triggered by contact behaviour) and real-time analytics on opens, clicks, bounces and unsubscribes. All data is stored on European servers in compliance with GDPR.

The key architectural difference compared with standalone marketing platforms is that every campaign — newsletter, promotion, transactional message — travels through the same dedicated, IP-whitelisted turboSMTP infrastructure. Sender reputation, tracking and deliverability are consistent across all email activity on the account.

A new public tool is now available to analyse any sending domain against the most relevant email authentication and compliance parameters: SPF, DKIM, DMARC, DNS setup and GDPR-related signals. The AI-driven engine returns a detailed assessment with concrete recommendations to improve email security, deliverability and compliance with the upcoming Gmail and Yahoo 2024 sender requirements. The tool is free, requires no account, and is available in six languages.

Version 4.0 of the official turboSMTP WordPress plugin brings full compatibility with WordPress 6.5, alongside general fixes accumulated over the 3.x branch. Subsequent point releases later in 2024 introduced UI alignment with the turboSMTP dashboard colours and improvements to chart rendering and i18n.

turboSMTP took part in Netcomm Forum 2024, the premier event for e-commerce and digital retail. The team held dedicated 1-on-1 sessions focusing on the critical role of transactional email delivery in driving customer retention and cart recovery.

During the two-day event, our deliverability specialists demonstrated how dedicated SMTP relays mitigate the risks of operational emails (like invoices and password resets) getting caught in spam filters, helping businesses maintain a seamless checkout-to-inbox workflow.

Official turboSMTP SDKs are now available for C# (.NET, .NET Standard, .NET Core) and PHP, published as open-source libraries on the turboSMTP GitHub organisation. The SDKs wrap the full HTTP API behind idiomatic builder-pattern clients and cover email sending, relay statistics, suppression list management and email address validation, removing the need for boilerplate HTTP plumbing in application code. Both SDKs are designed for transactional, marketing and notification workloads, with built-in support for the European region option and timezone-aware filtering of time-sensitive data.

turboSMTP presented its corporate and developer-focused solutions at SMAU Milano, Italy’s leading event for innovation and digital transformation. The showcase centered on cloud infrastructure security, high-speed automated dispatching, and GDPR compliance for enterprise senders.

The team hosted a practical workshop highlighting best practices for domain authentication, specifically guiding IT managers and software architects through advanced configurations of SPF, DKIM, and DMARC records to safeguard corporate communications.

Following the private beta opened in June, Custom Tracking Domains are now available to all turboSMTP accounts. Any account can configure one or more branded tracking domains directly from Settings → Tracking in the dashboard, without contacting support, by adding the two CNAME records provided during setup. All beta features remain in place: per-domain enable/disable, verification status indicators, Match sender domain rotation, and automatic blacklist monitoring with proactive notifications on listing events.

A planned infrastructure optimization and server upgrade was successfully completed to improve system performance and reliability. The intervention was scheduled during off-peak hours to minimize impact on sending activities. All services have been fully verified and are operating at optimal performance levels.

The turboSMTP customer support service has been consolidated into a fully 24/7 multichannel operation. Customers can now reach the team across three channels — email, live chat and phone — at any time of day, including weekends and holidays, with response coverage extended to all turboSMTP regions. The second-line team has been expanded and the first-line team has received additional training and broader access to tools, with the goal of resolving tickets at the first contact whenever possible. Every conversation, on every channel, is handled by a real member of the team.

As previously announced six months in advance, the legacy HTTP API v1 is no longer accepted as of today. All integrations must now use API v2, which offers larger attachment size, more descriptive error responses and a substantially more reliable backend. Requests sent to v1 endpoints will be rejected. SMTP submission on ports 25, 465, 587 and 2525 is unaffected by this change.

The new API v2 is now available, with larger attachment size, more descriptive error messages and a substantially more optimised and reliable backend compared to v1. The legacy API v1 will be discontinued on 1 April 2022: customers integrating with the HTTP API are required to migrate before that date. The support team is available 24/7 for migration assistance.

turboExecutive is now available: a companion app that combines a dedicated SMTP service with a real-time tracking system for individual emails. Once configured as the SMTP relay of any standard mail client (Outlook, Apple Mail, Thunderbird and others), turboExecutive reports in real time when each recipient receives, opens or clicks a message — including those in CC and BCC — and whether the message was displayed on desktop or mobile. The app is available for Windows, macOS, Linux, iOS and Android, and is designed for executives, sales teams and managers who rely on individual email correspondence rather than bulk campaigns.

Mailing list validation is now available to all PRO account holders, with 3,000 free validations per month included in the plan. The tool checks email addresses against syntax, domain, MX and mailbox-level signals to filter out invalid, risky and disposable addresses before sending — reducing bounce rate and protecting sender reputation. Additional validation credits can be purchased on demand for senders who need to clean larger lists.

A new Email Validation Tool is now available inside the turboSMTP dashboard, accessible to all account tiers. Contact lists can be imported as CSV or TXT (or entered manually) and are categorised address by address into seven statuses: Valid, Invalid, Catch-All, Spamtrap, Abuse, Do Not Mail and Unknown. Cleaned lists can be downloaded and used directly for sending. The validation tool runs on its own credit balance, separate from the sending balance, and is designed to be used as part of regular list hygiene to protect sender reputation and reduce bounces.

turboSMTP now pushes real-time event notifications to any HTTPS endpoint via webhooks. Two categories of events are emitted: delivery (processed, dropped, delivered, deferred, bounce) for the lifecycle of each message on the sending side, and engagement (open, click, unsubscribe, spam report) for recipient interactions. Each event is delivered as a JSON payload including message ID, recipient, timestamp and, depending on the event type, additional context such as bounce reason, retry attempt, click URL, user agent and IP address. The full reference is published on the public documentation page.

Version 3.0 of the official turboSMTP WordPress plugin ships an updated admin interface with improved style injection in the WordPress dashboard. The release consolidates a series of incremental fixes and compatibility updates accumulated over the 2.x branch.

A scheduled update to a number of internal technical requirements for GDPR compliance temporarily reduced the delivery speed of the service. The work was completed within the announced 48-hour window, with no mail loss; queued messages were processed in order and the service returned to its normal throughput shortly after.

Version 2.0 of the official turboSMTP WordPress plugin has been released. The major version migrates the plugin to the new turboSMTP HTTP API, delivering improved performance and a more reliable connection with the sending infrastructure. The plugin remains a drop-in replacement for the default wp_mail() function and continues to surface delivery analytics inside the WordPress admin area.

A hardware issue prevented some customers from accessing the dashboard and sending emails for a portion of the day. The engineering team worked on restoring the affected server and the service was brought back to normal operation within a few hours.

A new generation of the official turboSMTP WordPress plugin is now available on the WordPress.org directory. The release introduces a powerful in-dashboard analytics section showing real-time statistics for every email sent through wp_mail(), alongside refreshed assets and documentation. From this version onwards the plugin tracks not only delivery but also opens, clicks and bounces directly inside the WordPress admin area.

The long-awaited SendBlaster 4 is officially available, bringing massive enhancements to the email marketing ecosystem built around turboSMTP infrastructure. This major release introduces a brand new modern user interface, a redesigned HTML engine, and over 230 professional templates (including 60 fully responsive designs).

Architecturally, the platform integrates seamlessly with turboSMTP relay servers to deliver high-volume email campaigns, newsletters, and promotional mailings with maximum deliverability. New list management features, such as advanced segmentation and the Unsubscribe Replicator, allow turboSMTP users to maintain pristine list hygiene and further protect their sending IP reputation directly from their desktop environment.

A technical issue caused a slowdown of the email delivery queue across the platform. The underlying problem was fixed quickly; queued messages were then processed gradually until full recovery.

The click tracking system experienced an issue limited to Google Chrome — links opened in other browsers worked correctly. As a workaround, users were temporarily advised to disable click tracking from the advanced dashboard before sending newsletters.

A known issue caused slow email queues on a subset of accounts over several days. The team progressively restored full functionality by reprocessing queued mail account by account, while customers were able to resend impacted newsletters in the meantime.

The legacy hostname turbo-smtp.com is being decommissioned and can no longer be used as a sending server. All mail clients and email marketing software must be reconfigured with the new server name pro.turbo-smtp.com. Existing credentials and ports remain unchanged.

A transient issue caused some emails to remain queued for longer than usual. No messages were lost: all queued mail was delivered correctly, with a slight delay, while the team worked on the fix.

For security reasons, the password of a number of accounts was reset as a precautionary measure. Affected customers received an automated notice and were able to set a new password from the dashboard. No evidence of account misuse was observed.

A subset of accounts experienced queue issues; the rest of the turboSMTP platform was unaffected. The team actively worked on the issue until all impacted accounts were restored.

The click tracking service caused intermittent delivery issues for a few hours. As a workaround, customers were advised to temporarily disable click tracking from their client area to ensure messages were delivered correctly. The service was then fully restored.

The advanced dashboard now allows you to download all reports as .csv files: statistics, bounces, spam complaints and unsubscribers. This makes it easier to analyse campaign performance and drill down into the underlying data.

A brand new native WordPress plugin is now available, giving WordPress sites and applications direct access to the turboSMTP sending system without manual SMTP configuration. The plugin is published on the official WordPress.org directory.