Web & Networking
SPF (Sender Policy Framework)
A DNS-based email-authentication standard that tells receiving mail servers which IPs are permitted to send mail for your domain. Missing or broken SPF causes legitimate email to land in spam.
Source
Related terms
HTTP Status Codes (2xx / 4xx / 5xx)
Three-digit response codes returned by HTTP servers.
Timeout
The maximum time a client waits for a response before giving up.
DNS (Domain Name System)
The internet's address book — translates human-readable domain names like foursight.cloud into IP addresses…
A Record
A DNS record that maps a hostname to an IPv4 address (e.g.
AAAA Record
Maps a hostname to an IPv6 address.
CNAME Record
An alias DNS record that points one hostname to another (e.g.