{"id":354,"date":"2020-06-03T11:31:41","date_gmt":"2020-06-03T03:31:41","guid":{"rendered":"https:\/\/www.wesbytes.com\/guide\/?post_type=kb&p=354"},"modified":"2026-01-12T11:04:58","modified_gmt":"2026-01-12T03:04:58","slug":"spf-sender-policy-framework","status":"publish","type":"kb","link":"https:\/\/www.servergigabit.com\/guide\/kb\/spf-sender-policy-framework","title":{"rendered":"SPF (Sender Policy Framework)"},"content":{"rendered":"

\"SPF<\/h3>\n

SPF (Sender Policy Framework)<\/h3>\n

An extension of SMTP<\/a> which stops email spammers from forging the \u201cFrom\u201d fields in an e-mail.<\/p>\n

Due to SMTP itself does not have the mechanism to authenticate, SPF provides the authentication scheme by specifying which computers are authorized to send email from a specific domain.To use SPF, the domain sending e-mails must establish an SPF record that is published in DNS records. When e-mail passes through the DNS server, it is compared to the SPF record for that domain to determine if the sender is authorized to send e-mails from that sender\u2019s address. If the e-mail comes from a domain that is not authorized, the DNS server will not forward the e-mail to the expected destination.<\/p>\n

SPF only stops the spammer from forging the \u201cFrom\u201d field in the e-mail and does not stop the spammer from sending e-mails from a domain in which it is a member.<\/p>\n

To use SPF, the following standard have been declared.<\/p>\n

domain.com. IN TXT \u201cv=spf1 include:spf.mschosting.com -all\u201d<\/strong><\/p>\n


\n<\/strong>
\nFrom the rules,\u00a0v\u00a0<\/strong>stand for the version of SPF and currently available for spf1 (version 1) only.<\/p>\n

Eight mechanisms are defined:<\/p>\n

\u2013 ALL \u2013 Matches, used default result like -all
\n\u2013 A \u2013 A record that can be reach.
\n\u2013 IPv4 \u2013 IPv4 address range.
\n\u2013 IPv6 \u2013 IPv6 address range.
\n\u2013 MX \u2013 Mail Exchange record match.
\n\u2013 PTR \u2013 Reverse DNS (Record).
\n\u2013 EXISTS \u2013 If the given domain name resolves to other name.
\n\u2013 INCLUDE \u2013 Include policy.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

SPF (Sender Policy Framework) An extension of SMTP which stops email spammers from forging the \u201cFrom\u201d fields in an e-mail. Due to SMTP itself does not have the mechanism to authenticate, SPF provides the authentication scheme by specifying which computers are authorized to send email from a specific domain.To use SPF, the domain sending e-mails must establish an SPF record…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"kbtopic":[11],"kbtag":[1664],"class_list":["post-354","kb","type-kb","status-publish","hentry","kbtopic-general-email","kbtag-spf"],"_links":{"self":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb"}],"about":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/types\/kb"}],"author":[{"embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/comments?post=354"}],"version-history":[{"count":4,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/354\/revisions"}],"predecessor-version":[{"id":5824,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/354\/revisions\/5824"}],"wp:attachment":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/media?parent=354"}],"wp:term":[{"taxonomy":"kbtopic","embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kbtopic?post=354"},{"taxonomy":"kbtag","embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kbtag?post=354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}