1つのドメインに複数のSPFレコードを含めることはできますか？答えはノーです。ドメインに複数のSPFレコードがあってはなりません。そうでない場合、SPFはPermErrorで失敗します。
SPFレコードは、DNS内のTXTレコードであり、正確に「v = spf1」で始まり、その後に一連のメカニズムや修飾子が続きます。
SPFチェックは、ドメインで「v=spf1」で始まるすべてのTXTレコードをフェッチすることから始まります：
そのようなレコードが見つからない場合は、 Noneを返します; そのようなレコードが複数見つかった場合は、 PermErrorを返します…
Sender Policy Framework (SPF) is an email authentication mechanism which allows only authorized senders to send on behalf of a domain, and prevents unauthorized users from doing so. SPF allows the receiver to check that an email claiming to come from a specific domain indeed comes from…
While Safe SPF overcomes the 10-DNS-lookup limit in SPF, sometimes it's desirable to flatten only a part of your SPF record, while leaving the rest as is. If this is the case, you can use partial Safe SPF.
One good reason for this is that some email delivery services like HelpScout, Office 365, At…
Once you've created a Google Workspace, formerly known as G Suite, account on your domain, you will need to set up email authentication so that emails sent from Google Workspace on behalf of your domain are fully authenticated, and keep monitoring the authentication status and take action if necessa…
What is SPF?
Sender Policy Framework (SPF) is an email authentication mechanism which allows only authorized senders to send on behalf of a domain, and prevents unauthorized users from doing so. SPF allows the receiver to check that an email claiming to come from a specific domain indeed comes fro…
"SPF PermError: too many DNS lookups" is a common error seen in many SPF (Sender Policy Framework) implementations. When an often overlooked SPF 10-DNS-lookup limit is exceeded, an SPF PermError, aka SPF permanent error, is returned. SPF PermError's can affect your email deliverability…
