IP address

An Internet Protocol (IP) address is a string of numbers that identifies any device connected to a network. An IP address can be used to identify where data originates as well as its destination.  These addresses facilitate communication between networked devices.

IP addresses play an important role in email sending, because inbox service providers (ISPs) base their decision of placing emails in recipients’ inboxes based on the IP address’ reputation. How ISPs perceive an IP address demand on whether they see the address as spammy or containing quality content.