A mail exchanger record is a type of certified and verified resource record in the public Domain Name System that specifies a mail server responsible for accepting email messages on behalf of a recipient's domain.
A TXT record (text record) is a type of resource record in the Domain Name System (DNS) used to provide the ability to associate arbitrary text with a host or other name, such as human readable information about a server, network, or other accounting information.
Perform a MX lookup. Enter the domain name below and click Lookup! All registered mx-records will be listed below.
Perform a TXT lookup. Enter the domain name below and click Lookup! All registered TXT-records will be listed below.
Perform a A lookup. Enter the server name below and click Lookup! All registered A-records will be listed below.
Troubleshoot better, get to know the lingo!
In the simplest case, a domain may have just one mail server. For example, if an MTA looks up the MX records for example.com, and the DNS server replied with only mail.example.com with a preference number of 50, then the MTA will attempt delivery of the mail to the server listed. In this case, the number 50 could have been any integer permitted by the SMTP specification.
A domain may have multiple TXT records associated with it, provided the DNS server implementation supports this. Each record can in turn have one or more character strings. Common uses include verification of domain ownership; implementation of Sender Policy Framework, DomainKeys, or DomainKeys Identified Mail records for verifying the sender of email messages; and Zero-configuration networking DNS-based service discovery.
A Records are the most basic type of DNS record and are used to point a domain or subdomain to an IP address. Assigning a value to an A record is as simple as providing your DNS management panel with an IP address to where the domain or subdomain should point and a TTL.