What is a DNS TXT record?
Most DNS records contain data in a computer-readable language, but TXT records allow for both human- and computer-readable instructions. TXT records serve a variety of purposes, including domain name ownership verification, tin nhắn spam prevention and framework policies. They also provide general information and points of tương tác for the domain name.
TXT records have no specific formatting requirements, but they’re not meant for large amounts of data. Values longer than thở 255 characters will need đồ sộ be split into multiple parts, with each section that contains more than thở 255 characters enclosed in double quotes. In this case, both values would then need đồ sộ be added đồ sộ the TXT record.
How bởi TXT records prevent tin nhắn spam?
TXT records act as an tin nhắn authenticator by establishing that an tin nhắn comes from a trusted source and includes all servers authorized đồ sộ send messages on a domain’s behalf. They can also hold public key information (PKI) and store policies lượt thích Domain-based Message Authentication and Reporting và Conformance (DMARC).
What are DKIM records?
DKIM stands for Domain Keys Identified Mail. This type of record is a modified TXT record. DKIM records host public keys attached đồ sộ specific domains, and they’re used đồ sộ sign emails digitally. These records act as a security measure, helping đồ sộ ensure emails aren’t altered during transit.
What are DMARC records?
DMARC stands for Domain-based Message Authentication, Reporting and Conformance. These records are another type of DNS TXT record. Their purpose is đồ sộ signal đồ sộ servers whether đồ sộ quarantine, reject or allow a message đồ sộ be delivered. DMARC records are also used đồ sộ send reports đồ sộ specified tin nhắn addresses.
What is domain name ownership verification?
Uploading or editing a TXT record đồ sộ include important details about your domain name serves đồ sộ prove that you control the domain name, enabling providers đồ sộ validate the domain’s ownership. TXT records that are configured for domain name ownership verification allow providers requiring verification đồ sộ query your server and receive confirmation of ownership. An alternative is đồ sộ add a TXT tệp tin that includes a verification string đồ sộ your trang web server’s root directory.
What’s the difference between a TXT record and an SPF record?
SPF stands for Sender Policy Framework. SPFs were designed đồ sộ verify which IP addresses or fully qualified domain name names (FDQNs) are permitted đồ sộ send mail for a specified domain name, but SPF records have now been deprecated. Some providers still tư vấn SPF records, but TXT records are highly favored. Because an SPF record is a type of TXT record and all the same information can be stored in a TXT record, SPFs are redundant, and it’s recommended that TXT be used instead.
What is a TXT record lookup?
A DNS lookup tool can be used đồ sộ test changes đồ sộ TXT records đồ sộ ensure the changes have been propagated. DNS lookup tools can also verify that a domain’s DKIM record is being returned properly.