# SMTP Tester Pro: Email Test — Mail Server & STARTTLS Check

> 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-email-test/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: 2026-10-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/smtp-tester-pro-email-test/id6736591154/reviews.md

## What is SMTP Tester Pro?

Test any SMTP server from your iPhone or iPad. Enter the server, pick the encryption and login method, send a real test email, and see the complete SMTP conversation in a color-coded transaction log. SMTP Tester Pro is built for IT admins, developers and email administrators who need to know why mail isn't going out.

Connection and security:
- TLS modes: Require STARTTLS (port 587), Require TLS (SSL/TLS, port 465), Normal and Ignore TLS
- Login methods: LOGIN, PLAIN, CRAM-MD5 and XOAUTH2, or no login for relays and test servers
- Self-signed certificates and custom OpenSSL cipher suites
- Adjustable timeout

Real test emails:
- To, CC and BCC with comma-separated addresses
- HTML body with a built-in template and a plain-text fallback
- File attachments from the Files app
- Custom headers such as Reply-To or X-Priority

Transaction log:
- Every command and server reply, color-coded, with a color legend
- Successful and failed sends are saved in the log, grouped by day
- Search a log, show or hide timestamps, copy or share it
- Clear error messages with the server's own reply and troubleshooting tips

Templates:
- Server settings for Microsoft 365, Gmail, Outlook.com, iCloud Mail, Yahoo Mail, AOL Mail, Zoho Mail, GMX Mail, Yandex Mail and Mail.com
- Save your own servers as templates, stored encrypted on your device
- Password-protected backup and restore of your templates

Privacy and appearance:
- Face ID lock and password visibility settings
- Passwords and access tokens are never written to the log
- Light, Dark and System appearance, adjustable log font size and colors
- Works on iPhone and iPad

## 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

## Is SMTP Tester Pro safe?

Not enough ratings yet to assess SMTP Tester Pro.

## Is SMTP Tester Pro legit?

SMTP Tester Pro: Email Test appears to be a legitimate app. The AppsHunter Legitimacy Score for SMTP Tester Pro is 85 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/smtp-tester-pro-email-test/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)

### 1.7.1 — 2026-09-30

SMTP Tester Pro 1.7.1 fixes connections to mail servers that send their capabilities in several parts. These servers no longer fail with "STARTTLS was required but the server did not issue a STARTTLS command", and their login methods are detected correctly.

### 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!

## Apps similar to SMTP Tester Pro

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [MailCheck: SMTP Test & Debug](https://appshunter.io/ios/app/mailcheck-smtp-test-and-debug/id6758070852) | — | $2.99 | Developer Tools |
| [PeterJohn NumPy Matplotlib](https://appshunter.io/ios/app/peterjohn-numpy-matplotlib/id6471342492) | — | $12.99 | Developer Tools |
| [Console Mini](https://appshunter.io/ios/app/console-mini/id6744146152) | 5.0 (1) | $7.99 | Developer Tools |
| [SSL Checker - Sys admin tools](https://appshunter.io/ios/app/ssl-checker-sys-admin-tools/id6758877979) | — | Free | Developer Tools |
| [Kontainer](https://appshunter.io/ios/app/kontainer/id6742278087) | — | $6.99 | Developer Tools |
| [ReqPad - API Client & Tester](https://appshunter.io/ios/app/reqpad-api-client-and-tester/id6762038419) | — | Free | Developer Tools |

## More apps by Dorian Borovina

- [DNS Propagation](https://appshunter.io/ios/app/dns-propagation/id6736484331)
- [Domain Health: DNS Checker](https://appshunter.io/ios/app/domain-health-dns-checker/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 lookup](https://appshunter.io/ios/topics/smtp-lookup) · [post smtp](https://appshunter.io/ios/topics/post-smtp) · [smtp tester](https://appshunter.io/ios/topics/smtp-tester) · [dorian borovina](https://appshunter.io/ios/topics/dorian-borovina) · [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 2026-10-15.*