# MailCheck: SMTP Test & Debug — Network Server Log & Port Ping

> SMTP diagnostic tool for debugging email server connectivity and configurations. (iPhone/iPad app by 倩 罗.)

- Source: https://appshunter.io/ios/app/mailcheck-smtp-test-and-debug/id6758070852 (this page in markdown: same URL + `.md`)
- Developer: [倩 罗](https://appshunter.io/developer/1653510118)
- Category: Developer Tools, Utilities
- Price: $2.99
- Age rating: 4+
- Requires: iOS 16.6 · 6 MB
- Languages: American English
- Released: 2026-02-03
- Data updated: 2026-09-05
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/mailcheck-smtp-test-and-debug/id6758070852/reviews.md

## What is MailCheck?

MailCheck is the ultimate SMTP diagnostic tool designed for system administrators, developers, and IT professionals.

Stop guessing why your emails aren't sending. MailCheck gives you a direct look into the server conversation, helping you debug connectivity issues, verify SSL/TLS configurations, and test authentication credentials in seconds.

KEY FEATURES:

• Real-time SMTP Testing: Connect to any SMTP server (Gmail, Outlook, Office365, or custom servers) and verify connectivity instantly.
• Raw Server Logs: View the full verbose transcript of the client-server handshake. See exactly where the error occurs (e.g., 535 Authentication Failed, Timeout, or Certificate errors).
• Smart Port Configuration: Automatically toggles between SSL/TLS (465), STARTTLS (587), and Plain Text (25) based on your port selection.
• Security First: Verify if your server supports modern encryption standards.
• Privacy Focused: Passwords are NOT stored. All credentials are held in volatile memory (RAM) only during the session and are wiped immediately upon app termination.

PERFECT FOR:
- Testing new mail server setups.
- Debugging firewall or port blocking issues.
- Verifying "App Passwords" for third-party services.
- IT Admins troubleshooting client email configurations.

MailCheck is ad-free, lightweight, and built for speed.

[Note: This app is a diagnostic client and does not provide an email inbox service.]

## Key features

- Real-time SMTP testing
- View raw server logs
- Smart port configuration
- Verify SSL/TLS
- Test authentication

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/mailcheck-smtp-test-and-debug/id6758070852/reviews.md

### 5/5 — 🥲

*2026-05-31*

My email was bugging all day due to a config error… your app took me 13 sec to fix everything! Beyond shocked and impressed, good job w this one!

**Developer response:** Thank you! Really glad the app helped you fix the email config issue so quickly. That’s exactly what we built it for.

## Frequently asked questions about MailCheck

### What is MailCheck used for?

MailCheck is a diagnostic tool designed for system administrators and developers to test and debug SMTP server connectivity. It helps identify issues with email delivery by providing real-time server logs and testing configurations.

### Does MailCheck store my email credentials?

No, MailCheck is privacy-focused and does not store your passwords. Credentials are held only in volatile memory during the session and are wiped immediately upon app termination.

### What types of SMTP servers can MailCheck connect to?

MailCheck can connect to any SMTP server, including popular services like Gmail, Outlook, and Office365, as well as custom servers. It allows for instant verification of connectivity.

### How does MailCheck handle different port configurations?

MailCheck automatically toggles between SSL/TLS (port 465), STARTTLS (port 587), and Plain Text (port 25) based on your selected port. This simplifies testing various secure and non-secure connections.

### Is MailCheck available on Android devices?

Based on the provided data, MailCheck is supported on iPhone and iPad. Information regarding Android compatibility is not available.

### What is the price of MailCheck?

MailCheck is a paid application priced at $2.99. There are no in-app purchases or subscription fees mentioned.

### How often is MailCheck updated?

MailCheck was last updated on February 3, 2026, with version 1.0.1. This indicates a recent release, and further updates may follow based on developer activity.

### Does MailCheck have ads?

No, MailCheck is ad-free. The app is described as lightweight and built for speed, with no advertisements included.

## Version history (last 1 release)

### 1.0.1 — 2026-02-03

No release notes.

## More apps by 倩 罗

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- [Line Learner & Teleprompter](https://appshunter.io/ios/app/line-learner-and-teleprompter/id6754565517)
- [Solid Start: Picky Eater Help](https://appshunter.io/ios/app/solid-start-picky-eater-help/id6755153744)
- [Hex Editor & Viewer: Hex Eye](https://appshunter.io/ios/app/hex-editor-and-viewer-hex-eye/id6757299840)

All apps by 倩 罗: https://appshunter.io/developer/1653510118

## Related topics

[smtp tester](https://appshunter.io/ios/topics/smtp-tester) · [smtp tester pro](https://appshunter.io/ios/topics/smtp-tester-pro)

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*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 2026-09-05.*