Spf syntax tool

There are 2 main reasons that make SPF a must-have:. SPF is a technical email authentication process that protects senders and receivers against spoofing and phishing. The policy establishes a set of rules that the receiving email domains must follow to verify that incoming emails are sent from an authorized host within that domain's administration. As a result, the probability of your message ending up in the Inbox instead of Spambox increases.

SPF is a major factor, but it doesn't solve all your email delivery problems. Major Mailbox Providers usually report one of the following verification results:.

Neutral: The domain owner has explicitly stated that they don't want to assert whether the IP address is authorized or not. This is achieved by using the? This is achieved by using - qualifier -all. SoftFail: The IP address may or may not be authorized to send from the domain. This is mainly due to technical issues from the receiver side.

Hard fail. Mark the message with 'hard fail' in the message envelope and then follow the receiving server's configured spam policy for this type of message.

Soft fail. Mark the message with 'soft fail' in the message envelope. Typically, email servers are configured to deliver these messages anyway. Most end users do not see this mark. Do nothing, that is, do not mark the message envelope.

This is usually reserved for testing purposes and is rarely used. The following examples show how SPF works in different situations. In these examples, contoso. When woodgrovebank. Since IP address 12 is not in contoso. One drawback of SPF is that it doesn't work when an email has been forwarded. For example, suppose the user at woodgrovebank. The message originally passes the SPF check at woodgrovebank. For example, contoso. To do this, contoso. If it finds an additional include statement within the records for contoso.

In order to help prevent denial of service attacks, the maximum number of DNS lookups for a single email message is Each include statement represents an additional DNS lookup. Everything appears fine with your SPF record. It also features a DNS lookup counter. After the record is returned, it: checks if the SPF record syntax is correct; makes sure the number of mechanisms and modifiers that do DNS lookups does not exceed ten; "flattens" the returned SPF record into a list of plain IP addresses, so that you can check them one by one, in case it's necessary.

This is helpful when you need to track down some gnarly SPF issues. SPF is an email security protocol which checks if an email message is sent from a host on the whitelist specified by the domain's admin.

It specifies a list of IP addresses where email messages are allowed to sent on behalf of that domain. An SPF qualifier specifies the result of a mechanism evaluation. SPF Policy Tester. ORF Overview. This website uses cookies to offer you the best experience online. By continuing to use our website, you agree to the use of cookies.