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wakapi/scripts/email_checker.go
2023-01-02 15:31:28 +01:00

56 lines
931 B
Go

package main
// Usage example:
// cat emails.txt go run email_checker.go > result.txt
import (
"bufio"
"fmt"
"log"
"net"
"os"
"regexp"
"strings"
)
const MailPattern = "[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+"
var mailRegex *regexp.Regexp
func init() {
mailRegex = regexp.MustCompile(MailPattern)
}
func CheckEmailMX(email string) bool {
parts := strings.Split(email, "@")
if len(parts) != 2 {
return false
}
records, err := net.LookupMX(parts[1])
return len(records) > 0 && err == nil
}
func ValidateEmail(email string) bool {
return mailRegex.Match([]byte(email)) && CheckEmailMX(email)
}
func main() {
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
email := scanner.Text()
if email == "" {
return
}
if ValidateEmail(email) {
fmt.Printf("[+] %s\n", email)
} else {
fmt.Printf("[-] %s\n", email)
}
}
if err := scanner.Err(); err != nil {
log.Fatal(err)
}
}