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emailValidator.go
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/
emailValidator.go
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package main
import (
"net"
"net/mail"
"strings"
)
func CheckSingleEmail(mail string) (email string, isLexicalValid, isMxValid bool) {
email = fixEmail(mail)
return email, lexicalEmailValidator(email), checkMx(email)
}
//Returns validMails, lexicalInvalidMails, mxInvalidMails
func GetValidEmails(emails []string) (validMails, lexicalInvalidMails, mxInvalidMails []string) {
for _, email := range emails {
email = fixEmail(email)
if lexicalEmailValidator(email) {
if checkMx(email) {
validMails = append(validMails, email)
} else {
mxInvalidMails = append(mxInvalidMails, email)
}
} else {
lexicalInvalidMails = append(lexicalInvalidMails, email)
}
}
return validMails, lexicalInvalidMails, mxInvalidMails
}
func fixEmail(email string) string {
return strings.Replace(strings.ToLower(email), " ", "", -1)
}
func lexicalEmailValidator(email string) bool {
_, err := mail.ParseAddress(email)
return err == nil
}
func checkMx(email string) bool {
domain := email[strings.Index(email, "@")+1 : len(email)]
mxrecords, _ := net.LookupMX(domain)
//for _, mx := range mxrecords {
// fmt.Println(mx.Host, mx.Pref)
//}
if len(mxrecords) > 0 {
return true
}
return false
}