Karma Blocker vs Postgrey
A side-by-side look at Karma Blocker and Postgrey. For an in-depth review of either product, follow the links below.
Karma Blocker
Productivity
Karma Blocker is a Chrome extension that blocks distracting websites and apps to help increase productivity. It allows users to restrict access to select sites for set periods of time.
productivityfocuswebsite-blockingprocrastination
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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