Cisco Umbrella vs Postgrey
A side-by-side look at Cisco Umbrella and Postgrey. For an in-depth review of either product, follow the links below.
Cisco Umbrella
Security & Privacy
Cisco Umbrella is a cloud security platform that provides the first line of defense against threats on the internet. It blocks requests to malicious domains, IPs, URLs and files before a connection is established or a file is downloaded.
cloud-securitydns-filteringthreat-protectionweb-filteringendpoint-protection
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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