The appearance of the word "pass" in the text above indicates that the email has passed an authentication check. "spf=pass," for example, means the email did not fail SPF; it came from an authorized server with an IP address that is listed in the domain's SPF record. In this example...
If a SPF (TXT) RR exists and authorizes thesourceIP address the mail can be accepted by the MTA. If the SPF (TXT) RR does not authorize the IP address the mail can be bounced - it did not originate from an authorizedsourcefor thesender's domain. If the domain does not have an SPF...
mx.google.com gave this error: Your email has been blocked because the sender is unauthenticated. Gmail requires all senders to authenticate with either SPF or DKIM. Authentication results: DKIM = did not pass SPF [xxxxxxx.com] with ip: [2a01:111:f400:fe1e::728] = did not pass For in...
SPF records are a method to authenticate emails and verify that they are from the allowed sources, and are who they claim they are. However, SPF is not capable of performing an action based on the authentication results – it can only perform a check. This is where DMARC comes in. ...
“hard fail” the SPF check. However, realize that the protection is effective only when the sender’s domain has properly configured their SPF (most major service providers already do). Like everything when it comes to questions of security, this is not a blanket protection by any means, ...
SPF does not protect against spoofing or spam directly, nevertheless, this protocol is actively and successfully used to deploy spam filtering systems, as well as to protect against counterfeit emails, since it allows you to check each message against a specific domain and its reputation. ...
quarantine: E-mail that fails DMARC check should be considered suspicious.reject: E-mail that fails DMARC check should be rejected. sp Policy for all the subdomains – Optional, defaults to the parent domain policy if omitted. none: No specific action be taken regarding delivery of messages –...
SPF & SenderID Sender Policy Framework (SPF)is an email validation system, designed to prevent unwanted emails using a spoofing system. To check this common security problem, SPF going to verify the source IP of the email and compare it with a DNS txt record with a SPF content. ...
With this record the only way to pass the SPF check is for the smtp.mailfrom=example.com to come from the IP address203.0.113.81. So you are stating there is an MTA configuration where the smtp.mailfrom=example.com can come from some other IP address and pass the SPF check? Contributor...
The name of the host performing the SPF check. Normally the same as the receiving MTA. %{t} Only allowed in TXT records referenced by the exp field. Current timestamp. %{s} Replace with sender email address, for instance, info@example.com %{v} Replaced with "in-addr" if sender-ip ...