404 Error Message
This is the message that users receive when they land on a webpage that has been removed. Old URLs remain indexed by search engines, thus users have a chance at landing on pages that you have already removed from your...
Bounce Code
A three-digit code sent back to the server when an email bounces (cannot be delivered). A code beginning with four shows a bounce is temporary, a code beginning with five means the bounce is permanent.
Email Bounce
A rejection of an email to a user. A bounce code is generated upon the occurrence of an email bounce, providing information on why the email was rejected.
Email Deliverability
The deliverability of an email describes the likelihood a sent email actually reaches the attention of a recipient.
HTTP Status Code
This code expresses the meanings of responses from the web server when computers are communicating information to each other. The code is 3 digits with different meanings depending on the number. Responses are grouped in five classes: Informational responses (100–199)...
