Script spf_to_ip.sh is used to query SPF DNS record of given mail domain names and print converted IP addresses.

Run command with the mail domain names which you want to avoid gryelisting:

$ bash spf_to_ip.sh <domain> [domain ...]

For example:

$ bash spf_to_ip.sh google.com aol.com

it will print all IP addresses converted from spf record.

• dig
• awk
• sed
• grep
• head
• tr

• not supported spf syntax:

  • ptr ptr:
  • a/24 a:/24
  • mx/24 mx:/24
  • exists:

• SPF Record Syntax

• support spf syntax: ptr ptr: