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main.go
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main.go
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package main
import (
"bufio"
"fmt"
"log"
"net"
"os"
"strings"
)
func main() {
scanner := bufio.NewScanner(os.Stdin)
fmt.Printf("domain,hasMX,hasSPF,sprRecord,hasDMARC,dmarcRecord\n")
for scanner.Scan() {
checkDomain(scanner.Text())
}
if err := scanner.Err(); err != nil {
log.Fatal("Error: could not read from input: %v\n", err)
}
}
func checkDomain(domain string) {
var hasMX, hasSPF, hasDMARC bool
var spfRecord, dmarcRecord string
mxRecords, err := net.LookupMX(domain)
if err != nil {
log.Printf("Error: %v\n", err)
}
if len(mxRecords) > 0 {
hasMX = true
}
txtRecords, err := net.LookupTXT(domain)
if err != nil {
log.Printf("Error:%v\n", err)
}
for _, record := range txtRecords {
if strings.HasPrefix(record, "v=spf1") {
hasSPF = true
spfRecord = record
break
}
}
dmarcRecords, err := net.LookupTXT("_dmarc." + domain)
if err != nil {
log.Printf("ErrorL%v\n", err)
}
for _, record := range dmarcRecords {
if strings.HasPrefix(record, "v=DMARC1") {
hasDMARC = true
dmarcRecord = record
break
}
}
fmt.Printf("%v, %v, %v, %v, %v, %v", domain, hasMX, hasSPF, spfRecord, hasDMARC, dmarcRecord)
}