DNS66 vs Postgrey
A side-by-side look at DNS66 and Postgrey. For an in-depth review of either product, follow the links below.
DNS66
Security & Privacy
DNS66 is an open-source ad blocking app for Android. It works by redirecting domain name requests to a local VPN server running on the device, which filters out requests to ad and tracking domains.
ad-blockingprivacydns-filtering
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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SpamAssassin
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AdClear
MailRoute