diff --git a/mx.go b/mx.go
index 889e034..c9cbbee 100644
--- a/mx.go
+++ b/mx.go
@@ -12,8 +12,8 @@ type Mx struct {
 func (v *Verifier) CheckMX(domain string) (*Mx, error) {
 	domain = domainToASCII(domain)
 	mx, err := net.LookupMX(domain)
-	if err != nil {
-		return nil, ParseSMTPError(err)
+	if err != nil && len(mx) == 0 {
+		return nil, err
 	}
 	return &Mx{
 		HasMXRecord: len(mx) > 0,