What are MX Records ?
An MX record or Mail exchanger record is a type of resource record in the Domain Name System (DNS) specifying how Internet e-mail should be routed. MX records point to the servers that should receive an e-mail, and their priority relative to each other. An MX record must contain a host name defined by an A record. An A record or address record maps a hostname to a 32-bit IPv4 address. When an e-mail message is sent through the Internet, the sending Mail Transfer Agent (MTA) e.g. Microsoft Exchange Server, makes a DNS query requesting the MX record for the recipient’s domain name (the portion of the e-mail address following the “@”). This query returns a list of host names of mail exchange servers accepting incoming mail for that domain, together with a preference number. The sending agent then attempts to establish a Simple Mail Transfer Protocol (SMTP) connection to one of these servers, starting with the one with the smallest preference number, delivering the message to the first ser
MX Records point to the mail server that is responsible for the receipt and delivery of your email. By default Server101 handles your email. Though you can specify your own mail server in this facility if you have a server setup to send & receive email. Note: Do not change these settings if you do not know what you are doing. Doing so may cause email to be permanently unretrievable.
