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Blok: Simple Fast Firewall vs SMTP Diag Tool

A side-by-side look at Blok: Simple Fast Firewall and SMTP Diag Tool. For an in-depth review of either product, follow the links below.

Blok: Simple Fast Firewall

Blok: Simple Fast Firewall

Security & Privacy

Blok is a simple, fast firewall app for Mac that helps protect your privacy. It monitors incoming and outgoing connections to block unwanted traffic.

privacysecurityfirewallmacos
SMTP Diag Tool

SMTP Diag Tool

Network & Admin

SMTP Diag Tool is a free, open-source Windows application used to diagnose issues with sending and receiving emails. It can test SMTP servers, validate email addresses, verify DNS records, and check for common email delivery problems.

smtpemaildiagnostictroubleshooting