The spf record, which is the initials of the sender policy framework, was created by microsoft and is used to control spam mails. It is in the nature of "Presentation of identity". Spf in more terms; it is used to specify which hosts are authorized to Lithuania Phone Number List send mail on behalf of a domain to mail servers.Spf record formatspf records are often identified with a txt record. There is also a specially created record type for the spf record Lithuania Phone Number List , but it is not used much anymore. Therefore, if you are going to make an spf record, you should at least master the txt record.Spf records are in the form of a single string of text:v=spf1 a mx ip4:69.64.153.131 include:_spf~allthe spf record always starts with "V=" . This shows the spf version used. Current version should be spf1
. Because spf1 is currently the most widely used spf type.There are multiple terms behind the version indicator. These terms allow hosts to Lithuania Phone Number List send mail to the domain name or provide additional information to the spf record. Terms; consists of mechanisms and markers. Some mechanisms are:allincludeamxip4ip6existsthere is also a mechanism called “ptr” , but you should not use it.There are 2 markers outside of the mechanisms:redirectexpspf mechanismsthe following mechanisms define ip addresses that Lithuania Phone Number List are allowed to send email through the domain Lithuania Phone Number List name:amxip4ip6existsan e-mail server compares the ip addresses of the senders with the ip addresses defined in the mechanisms. If the ip address matches one of the records, it will receive a "+" or "Pass" in the result.All mechanisms match addresses. Mechanisms are usually created for any ip that does not match the previous mechanisms.All mechanisms use phrases related to matches. We mentioned “pass” and “+” above. Other than that, “-“ for failure, “~” for more acceptable failure
and “?” for neutrality. Used. If a Lithuania Phone Number List mechanism has indicated a failure “-“ :spf markerstokens are separated by “=” and provide additional information by providing information such as name, value. Tokens are shown at the very end of the spf record.Redirect tokens are used to point to another spf record for use. This is used when you have multiple domains and want to use the same spf content across multiple Lithuania Phone Number List domains. If you're using both domains, you should use redirects, otherwise you'll need to use the include specifier.The exp token is used to explain when you are defined as “-“ by the mechanisms .Spf registration limitationseach of the fully qualified names can have either a txt record or an spf record. You must have a txt record as spf's own record type is deprecated.There are some limitations on the number of searches and items allowed in an spf record:spf records can have more than 10 mechanisms. These are include, a, mx, ptr and exists mechanisms.The number of mx records