spfquery:tldr:77d83

The command "spfquery" is used to perform an SPF (Sender Policy Framework) lookup and obtain information about the email authentication policy of a specific sender.

Let's break down the command and its parameters:

• "spfquery": This is the command or executable that is being invoked.
• "-ip ${8-8-8-8}": This parameter is used to specify the IP address from which the query is being made. In this case, the IP address is set to "8.8.8.8", which is the well-known DNS resolver operated by Google.
• "-sender ${sender@example-com}": This parameter is used to specify the email address of the sender whose SPF record you want to query. In this example, it is set to "sender@example-com".
• "--debug": This parameter is used to enable debug mode, which provides additional detailed information about the SPF query and its results.

When the command is executed, it will send an SPF query to the DNS server based on the provided parameters. The server will then respond with the SPF record associated with the sender's domain, if one exists. The debug mode will provide additional information about the query process and help in troubleshooting any issues.