System Requirements
The basic requirements to operate Swift Mailer are extremely minimal and easily achieved. Historically, Swift Mailer has supported both PHP 4 and PHP 5 by following a parallel development workflow. Now in it's fourth major version, and with PHP 4 support officially dropped by its makers at Zend, Swift Mailer operates on servers running PHP 5.2 or higher.
The library aims to work with as many PHP 5 projects as possible:
- PHP 5.2 or higher, with the SPL extension (standard)
- Limited network access to connect to remote SMTP servers
- 8 MB or more memory limit (Swift Mailer uses around 2 MB)
Parent topic: Library Overview
Next topic: Component Breakdown
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