# SMTP Tester Pro — SMTP debugging on the go > Mobile tool for testing and debugging SMTP connections with detailed logging. (iPhone/iPad app by Dorian Borovina.) - Source: https://appshunter.io/ios/app/smtp-tester-pro/id6736591154 (this page in markdown: same URL + `.md`) - Developer: [Dorian Borovina](https://appshunter.io/developer/1772141221) - Category: Developer Tools, Utilities - Price: $3.99 - Age rating: 4+ - Requires: iOS 16.6 · 4 MB - Languages: American English - Released: 2024-10-07 - Data updated: 2026-09-14 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/smtp-tester-pro/id6736591154/reviews.md ## What is SMTP Tester Pro? SMTP Tester Pro is the ultimate tool for developers, IT professionals, and email administrators who need to test and debug SMTP connections.  Available for iOS 16.0+ and iPadOS 16.0+, SMTP Tester Pro simplifies the process of setting up, testing, and troubleshooting email servers with its user-friendly interface and powerful features. Key Features: - Intuitive SMTP server configuration - Support for multiple authentication methods (Login, Plain, CRAM-MD5, XOAUTH2) - Multiple TLS modes (Normal, Ignore TLS, Require TLS, Require STARTTLS) - TLS fine-tuning with self-signed certificate support and custom OpenSSL cipher suites - Customizable timeout settings - HTML email composition with a built-in professional template and automatic plain-text fallback - File attachments from the Files app with automatic MIME-type detection and multi-selection - Custom email headers - Reply-To, X-Mailer, In-Reply-To, or any header your testing requires - Multiple recipients with comma-separated lists for To, CC and BCC - Reliable multipart delivery so HTML emails with attachments render correctly in every mail client - Template management for quick setup - Detailed SMTP transaction logs with a refined color palette for both light and dark themes - Light, Dark and System appearance modes - Face ID security option - Customizable log appearance with adjustable font size and per-message colors - Backup and restore functionality for templates - Unified native iOS design across every screen Whether you're setting up a new email server, diagnosing issues with existing configurations, or simply learning about SMTP protocols, SMTP Tester Pro provides all the tools you need in one convenient app. Ideal for: - Software Developers - System Administrators - Email Server Administrators - IT Support Professionals - Students learning about email protocols SMTP Tester Pro offers predefined templates for popular email services like Gmail, Outlook, Yahoo, and more, making it easy to get started.  You can also create and manage your own custom templates for frequently used configurations. The detailed logs provide insights into every step of the SMTP conversation, helping you identify and resolve issues quickly.  With customizable log appearance, including font size and color coding, you can tailor the app to your preferences for better readability. Security features include Face ID for app access and the ability to manage password visibility. The app also includes a "How to" guide to help you make the most of its features. Available on iPhone and iPad, SMTP Tester Pro maintains the same intuitive interface and powerful functionality across all your iOS devices. Download SMTP Tester Pro today and take the hassle out of email server debugging! ## Key features - SMTP server configuration - Support for various authentication methods - Multiple TLS modes - Customizable timeout settings - Email composition with CC/BCC - Template management - Detailed SMTP transaction logs ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/smtp-tester-pro/id6736591154/reviews.md ### 5/5 — Super Werkzeug *2026-04-18* Was für ein hochwertiges Tool! Top UI, hilfreiche Detail-Logs etc. Tolle App! **Developer response:** Hey Daniel, vielen Dank für deine tolle Rezension! Freut mich, dass es dir gefallen hat! Dorian ### 1/5 — Не работает *2025-08-27* По тайм-ауту запросы не проходят **Developer response:** Thank you for your feedback. I'm sorry to hear you're experiencing timeout issues with the app. I'm not entirely sure what might be causing this problem on your end. The app has been thoroughly tested against multiple SMTP servers and is working as intended. However, I understand how frustrating this must be for you. To help us identify and resolve this issue, could you please provide some additional details about your setup? This might include: - Which SMTP server/email provider you're using - Any specific error messages you're seeing - Your device and OS version - Network environment (corporate, home, etc.) I'm committed to getting this working properly for you and would be happy to work together on finding a solution. Once we resolve this, I'd greatly appreciate if you could consider updating your review. Please reach out to me directly at dorian@borovina.com with the additional details, and I'll prioritize getting this fixed for you. Thank you for your patience, and I look forward to hearing from you soon. ### 5/5 — Easy to set up 👍 *2025-01-25* Fantastic tool for testing email servers. Easy to set up and provides detailed diagnostics to ensure everything runs smoothly. A must-have for anyone managing email systems. **Developer response:** Thank you! ### 5/5 — Helpful *2025-01-17* It is easier to check my SMTP connections. Nice design. I worked with the other apps from this developer and can recommend it. **Developer response:** Thanks so much! ## Frequently asked questions about SMTP Tester Pro ### What is SMTP Tester Pro used for? SMTP Tester Pro is designed to help developers and IT professionals test and debug SMTP connections. It allows for easy configuration of SMTP servers, composition of test emails, and analysis of detailed transaction logs to identify and resolve issues. ### What devices is SMTP Tester Pro available on? SMTP Tester Pro is available for iPhone and iPad devices running iOS 16.0+ and iPadOS 16.0+ respectively. It maintains a consistent interface across all supported iOS devices. ### Does SMTP Tester Pro support different authentication methods? Yes, SMTP Tester Pro supports various authentication methods including Login, Plain, CRAM-MD5, and XOAUTH2. This flexibility ensures compatibility with a wide range of SMTP server configurations. ### How does SMTP Tester Pro handle TLS encryption? The application supports multiple TLS modes, including Normal, Ignore TLS, Require TLS, and Require STARTTLS. This allows users to test and configure connections with different levels of encryption security. ### Can I save my SMTP configurations with SMTP Tester Pro? Yes, SMTP Tester Pro features template management, allowing you to create and save custom templates for frequently used SMTP configurations. It also offers predefined templates for popular email services like Gmail, Outlook, and Yahoo. ### What kind of logs does SMTP Tester Pro provide? SMTP Tester Pro provides detailed SMTP transaction logs that offer insights into every step of the email conversation. It also includes app logs for general operations, helping users to diagnose issues comprehensively. ### Is SMTP Tester Pro secure to use? SMTP Tester Pro includes security features such as Face ID for app access and options to manage password visibility. It is designed with IT professionals and developers in mind, prioritizing secure handling of connection details. ### How often is SMTP Tester Pro updated? The latest version, 1.5.0, was released on October 15, 2025. While specific update frequency isn't detailed, the recent update indicates ongoing development and support for the application. ## Version history (last 5 releases) ### 1.7.0 — 2026-09-13 SMTP Tester Pro 1.7.0 connects right away, and tells you exactly why when it doesn't. The default settings and every predefined template now use the encryption your provider expects, and errors show what the server actually replied. - Correct TLS defaults: new settings and all ten predefined templates now use Require STARTTLS on port 587, so Gmail, Outlook, iCloud and the other providers connect instead of timing out. Predefined templates fill in only the server settings and keep your addresses, credentials and message. - Servers without login: turning off "Server Requires Authentication" now really skips the login, so you can test relays and local test servers. The login fields are hidden while it's off. - Clear error messages: errors say what went wrong instead of showing a generic code, and include the server's own response, for example why a login was rejected. A missing or invalid sender address is caught before connecting. - Private logs: passwords and access tokens are no longer written to the transaction log or to error messages, with every authentication method. - More reliable sending: the app stays responsive while it connects and signs in. Messages use standard line endings, and a line containing only a dot no longer cuts a message short. - Cleaner logs: every log opens the same way, server replies are no longer listed twice, line colors match the legend, and hiding timestamps now works with a 12-hour clock too. - Stronger protection: template backups use stronger password protection; importing them requires version 1.7.0 or later, and older backups still import. If Face ID can't unlock the app, your device passcode can. - Polished interface and fixes: every field on Home is labeled, TLS options are grouped, alerts have clear titles, and the How To guide covers HTML, attachments and custom headers. Fixed a crash with an empty sender address, templates saved by early versions reappear, and the Rate on App Store link opens the App Store. Thanks for using SMTP Tester Pro! If you have ideas or run into anything, reach out at dorian@borovina.com ### 1.6.0 — 2026-05-12 - HTML email bodies with a built-in professional template, plus an automatic plain-text fallback for clients that can't render HTML. - File attachments - pick any file from the Files app. MIME types are detected automatically, and multi-selection is supported. - Custom email headers - Reply-To, X-Mailer, In-Reply-To, or anything else your testing requires. - Multiple recipients - To, Cc and Bcc now accept comma-separated lists. - TLS fine-tuning - allow self-signed certificates or specify a custom OpenSSL cipher suite when your server requires one. - Reliable multipart delivery - resolved a long-standing issue so HTML emails with attachments now render correctly in every mail client. - A refined log color palette for both light and dark themes - readable, semantically meaningful, easy on the eyes. - Unified native iOS design across Home, Logs, Settings and How to Use. ### 1.5.0 — 2025-10-15 - AES-256 template encryption with password-protected export/import for cross-device security - Face ID now required to view passwords in clear text - Improved timeout protection with app-level safety net prevents hanging - Failed connections now show transaction logs with exact failure points - Enhanced error messages with detailed troubleshooting for timeouts, authentication, and port issues - Appearance modes: Light, Dark, or System to match your preference - What's New screen highlights major updates ### 1.4.0 — 2025-09-20 Update to iOS 26 design guidelines. Improved Navigation: Updated to the latest iOS 26 navigation system for smoother, more responsive app performance Modern Interface: Refined UI elements that feel more natural and follow the latest iOS 26 design guidelines Please consider leaving a review to support my work! Thank you for using SMTP Tester Pro! ### 1.3.0 — 2025-06-09 SMTP Transaction Logs are now stored persistently for easy access. - An empty log view displays when no logs are available. - A single log shows directly for quick viewing. - Multiple logs appear in a timestamped list for individual access. Swipe to copy or delete logs. App Log has been removed, with SMTP Transaction Log as the default. Update to streamline your SMTP testing! ## Apps similar to SMTP Tester Pro | App | Rating | Price | Category | | --- | --- | --- | --- | | [SMTPTester - Test smtp service](https://appshunter.io/ios/app/smtptester-test-smtp-service/id1633950905) | 1.0 (1) | $0.99 | Developer Tools | | [SSL Checker](https://appshunter.io/ios/app/ssl-checker/id1347743213) | 4.7 (55) | $2.99 | Developer Tools | | [MailerSend](https://appshunter.io/ios/app/mailersend/id1673019196) | 3.7 (9) | Free | Developer Tools | | [Cloudy for Cloudflare](https://appshunter.io/ios/app/cloudy-for-cloudflare/id6505042142) | — | Free | Developer Tools | | [APIOrbit – REST & GraphQL](https://appshunter.io/ios/app/apiorbit-rest-and-graphql/id6742253618) | — | Free | Developer Tools | | [n8n Toolbox](https://appshunter.io/ios/app/n8n-toolbox/id6746510452) | — | $5.99 | Developer Tools | ## More apps by Dorian Borovina - [DNS Propagation](https://appshunter.io/ios/app/dns-propagation/id6736484331) - [Domain Health](https://appshunter.io/ios/app/domain-health/id6739490717) - [HeC - Unofficial Hetzner Cloud](https://appshunter.io/ios/app/hec-unofficial-hetzner-cloud/id6758351166) All apps by Dorian Borovina: https://appshunter.io/developer/1772141221 ## Related topics [smtp tester pro](https://appshunter.io/ios/topics/smtp-tester-pro) · [smtp tester](https://appshunter.io/ios/topics/smtp-tester) · [post smtp](https://appshunter.io/ios/topics/post-smtp) · [dorian borovina](https://appshunter.io/ios/topics/dorian-borovina) · [smtp lookup](https://appshunter.io/ios/topics/smtp-lookup) · [smtp](https://appshunter.io/ios/topics/smtp) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-14.*