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Example code of accountdesk/mail-autodetect

Informations about the package mail-autodetect

Mail-AutoDetect

Latest Version Total Downloads License PHP Version CI

Mail server discovery on autopilot

PHP library for automatic detection of IMAP and SMTP server settings for any domain.

Installation

Option 1: Composer

Option 2: Manual

Copy src/AutoDetector.php into your project and include it:

Requirements:

Usage

Output:

Configuration

Logging (PSR-3)

Log levels:

Caching

DNS and HTTP results are automatically cached (in-memory per request). Multiple queries for the same domain won't trigger duplicate requests.

Detection Strategies

The library uses multiple strategies in descending reliability:

# Strategy Score Description
1 Mozilla ISPDB 95 Thunderbird autoconfig database
2 Known MX 92 Known providers (Gmail, Outlook, etc.) via MX pattern
3 Microsoft Autodiscover 92 Exchange/Office 365 (requires email)
4 DNS SRV 90 RFC 6186 service records
5 Domain Autoconfig 90 autoconfig.domain/mail/config-v1.1.xml
6 MX Heuristic 75-80 MX record + SPF parsing + TCP check
7 Standard Hosts 55-70 imap.domain, smtp.domain + TCP check

Score calculation:

Response Format

Each candidate contains:

Field Type Description
host string Server hostname
port int Port (993, 465, 587, ...)
ssl string ssl, starttls, or plain
auth string|null Auth method (if known)
source string Primary source
sources array All sources that found this server
score int Confidence score (0-100)
match_count int Number of sources

Security Considerations

Important: This library detects mail server configurations but does NOT validate them.

Before using detected settings with real credentials:

  1. Always confirm with the user - Show the detected hostname/port and ask for explicit confirmation
  2. Don't auto-connect - Never automatically test connections with real passwords
  3. Validate the domain - Ensure the detected hosts belong to the expected domain

Example secure implementation:

Why this matters: A malicious domain could configure autoconfig/autodiscover to point to an attacker-controlled server, potentially capturing credentials.

License

MIT

Testing

This library uses static analysis (Mago) instead of unit tests. Network-dependent libraries like this are better validated through real-world usage than mocked tests.

All versions of mail-autodetect with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
ext-curl Version *
ext-simplexml Version *
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