Enter your master password to access the verifier engine.
How it works: How long the proxy waits for a firewall to respond before giving up. Increase this (15-20) for strict B2B firewalls to lower Unknowns. Decrease (5-8) for blistering speed.
How it works: How many different proxy IPs to try if the first one is blocked by Spamhaus. Higher = More accurate, but slower.
How it works: How many emails to verify simultaneously per worker thread. High numbers (250+) offset slow timeouts.