forked from Spokepoint/smtp-callback-verification
/
smtp.go
45 lines (40 loc) · 754 Bytes
/
smtp.go
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package main
import (
"net"
"net/smtp"
"strings"
)
func parseDomain(email string) string {
coll := strings.Split(email, "@")
if len(coll) == 2 {
return coll[1]
}
return ""
}
// VerifyEmail checks an email by using SMTP Callback Verification method
//
// Reference:
// http://en.wikipedia.org/wiki/Callback_verification
func VerifyEmail(email string) (isValid bool, err error) {
mx, err := net.LookupMX(parseDomain(email))
if err != nil {
return
}
c, err := smtp.Dial(mx[0].Host + ":25")
if err != nil {
return
}
err = c.Hello("verify-email.org")
if err != nil {
return
}
err = c.Mail("check@verify-email.org")
if err != nil {
return
}
if err := c.Rcpt(email); err == nil {
isValid = true
}
err = c.Quit()
return
}