Postgrey vs Stackless Python

A side-by-side look at Postgrey and Stackless Python. For an in-depth review of either product, follow the links below.

Postgrey

Network & Admin

Postgrey is an SMTP proxy program that temporarily delays mail delivery to help mitigate spam. It uses greylisting to reject initial email delivery attempts, forcing email servers to retry sending messages and confirming they are not spammers.

greylistingsmtpemail-deliveryantispam

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Stackless Python

Development

Stackless Python is a Python programming language implementation featuring microthreads and no Global Interpreter Lock (GIL). It allows massive concurrency and offers better scalability for Python programs.

pythonconcurrencymicrothreadsscalability

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