You can think of your domain as a new car. SPF, or Sender Policy Framework, is a type of email authentication protocol that defines which mail servers and applications, are allowed to send from your domain. Sender Policy Framework, along with DKIM, DMARC, and BIMI make up the building blocks of email authentication. SPF or Sender Policy Framework has helped protect millions of domains against spoofing and prevents legitimate outgoing email messages from being marked as spam. Read this article to learn more about SPF, SPF failures, how to avoid them, and how SPF authentication affects DMARC.
Thus, there are many factors that can cause your SPF records to fail to cause SPF soft fails, SPF hard fails, and other SPF failures. SPF is an important form of email authentication that reduces the number of spammers that succeed on the web. SPF SoftFail – Everything that Causes an SPF Fail
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