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!