mailcheck

Tool for checking the existence of MX, SPF and DMARC records for domain names.

Prerequisites

• Go

Installation

$ go get -v github.com/dstotijn/mailcheck

Usage

Outputting results to stdout:

$ mailcheck < domains.txt

Outputting results to file:

$ mailcheck < domains.txt > output.csv

Reading result output

The first line has CSV-headers:

domain,hasMX,hasSPF,spfRecord,hasDMARC,dmarcRecord

Each subsequent line has 6 comma separated fields:

• domain: Domain name
• hasMX: Domain has at least one MX record? (true or false)
• hasSPF: Domain has SPF record? (true or false)
• spfRecord: SPF record contents
• hasDMARC: Domain has DMARC record? (true or false)
• dmarcRecord: DMARC record contents