From 33aa3556d2d55deb98f84b20cce0c7f71cab6ce4 Mon Sep 17 00:00:00 2001
From: link2xt <link2xt@testrun.org>
Date: Sat, 30 Oct 2021 22:35:46 +0000
Subject: [PATCH] Use system resolver configuration instead of Google DNS for
 MX queries

---
 src/provider.rs | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/src/provider.rs b/src/provider.rs
index 722cbfd80..be4c0f4ec 100644
--- a/src/provider.rs
+++ b/src/provider.rs
@@ -4,7 +4,7 @@ mod data;
 
 use crate::config::Config;
 use crate::provider::data::{PROVIDER_DATA, PROVIDER_IDS, PROVIDER_UPDATED};
-use async_std_resolver::{config, resolver};
+use async_std_resolver::resolver_from_system_conf;
 use chrono::{NaiveDateTime, NaiveTime};
 
 #[derive(Debug, Display, Copy, Clone, PartialEq, FromPrimitive, ToPrimitive)]
@@ -118,12 +118,7 @@ pub fn get_provider_by_domain(domain: &str) -> Option<&'static Provider> {
 ///
 /// For security reasons, only Gmail can be configured this way.
 pub async fn get_provider_by_mx(domain: &str) -> Option<&'static Provider> {
-    if let Ok(resolver) = resolver(
-        config::ResolverConfig::default(),
-        config::ResolverOpts::default(),
-    )
-    .await
-    {
+    if let Ok(resolver) = resolver_from_system_conf().await {
         let mut fqdn: String = domain.to_string();
         if !fqdn.ends_with('.') {
             fqdn.push('.');