diff --git a/core/src/smtp/connect.rs b/core/src/smtp/connect.rs
index 3d9fc129f..97a579dcd 100644
--- a/core/src/smtp/connect.rs
+++ b/core/src/smtp/connect.rs
@@ -29,7 +29,7 @@ use std::time::Duration;
 
 use trust_dns_proto::rr::Name;
 
-use super::{gmail::is_gmail, outlook::is_outlook, parser, yahoo::is_yahoo};
+use super::{gmail::is_gmail, outlook::is_hotmail, parser, yahoo::is_yahoo};
 use super::{SmtpDetails, SmtpError};
 use crate::util::{constants::LOG_TARGET, input_output::CheckEmailInput};
 
@@ -224,7 +224,7 @@ async fn smtp_is_catch_all(
 ) -> Result<bool, SmtpError> {
 	// Skip catch-all check for known providers.
 	let host = host.to_string();
-	if is_gmail(&host) || is_outlook(&host) || is_yahoo(&host) {
+	if is_gmail(&host) || is_hotmail(&host) || is_yahoo(&host) {
 		return Ok(false);
 	}
 
diff --git a/core/src/smtp/mod.rs b/core/src/smtp/mod.rs
index 69d0564f1..0b56d4c4e 100644
--- a/core/src/smtp/mod.rs
+++ b/core/src/smtp/mod.rs
@@ -32,7 +32,11 @@ use crate::{util::input_output::CheckEmailInput, LOG_TARGET};
 use connect::check_smtp_with_retry;
 pub use error::*;
 
-use self::{gmail::is_gmail, outlook::is_outlook, yahoo::is_yahoo};
+use self::{
+	gmail::is_gmail,
+	outlook::{is_hotmail, is_outlook},
+	yahoo::is_yahoo,
+};
 
 /// Details that we gathered from connecting to this email via SMTP
 #[derive(Debug, Default, Deserialize, Serialize)]
@@ -100,15 +104,7 @@ pub async fn check_smtp(
 		// The password recovery page do not always work with Microsoft 365
 		// addresses. So we only test with @hotmail and @outlook addresses.
 		// ref: https://github.com/reacherhq/check-if-email-exists/issues/1185
-		//
-		// After some testing, I got:
-		// - *@outlook.com -> `outlook-com.olc.protection.outlook.com.`
-		// - *@outlook.fr -> `eur.olc.protection.outlook.com.`
-		// - *@hotmail.com -> `hotmail-com.olc.protection.outlook.com.`
-		// - *@hotmail.fr -> `eur.olc.protection.outlook.com.`
-		//
-		// So it seems that outlook/hotmail addresses end with `olc.protection.outlook.com.`
-		if host_lowercase.ends_with("olc.protection.outlook.com.") {
+		if is_hotmail(&host_lowercase) {
 			return outlook::hotmail::check_password_recovery(to_email, webdriver)
 				.await
 				.map_err(|err| err.into());
diff --git a/core/src/smtp/outlook/mod.rs b/core/src/smtp/outlook/mod.rs
index 92a80a77f..3c8c9c077 100644
--- a/core/src/smtp/outlook/mod.rs
+++ b/core/src/smtp/outlook/mod.rs
@@ -2,8 +2,24 @@
 pub mod hotmail;
 pub mod microsoft365;
 
-/// Check if a MX host is from outlook.
+/// Check if a MX host is from outlook (includes @hotmail.*, @outlook.* and
+/// all Microsoft 365 addresses).
 pub fn is_outlook(host: &str) -> bool {
 	host.to_lowercase()
 		.ends_with(".mail.protection.outlook.com.")
 }
+
+/// Check if a MX host is an @hotmail.* or @outlook.* email.
+///
+/// After some testing, I got:
+/// - *@outlook.com -> `outlook-com.olc.protection.outlook.com.`
+/// - *@outlook.fr -> `eur.olc.protection.outlook.com.`
+/// - *@hotmail.com -> `hotmail-com.olc.protection.outlook.com.`
+/// - *@hotmail.fr -> `eur.olc.protection.outlook.com.`
+/// - *@hotmail.nl -> `eur.olc.protection.outlook.com.`
+///
+/// So it seems that outlook/hotmail addresses end with `olc.protection.outlook.com.`
+pub fn is_hotmail(host: &str) -> bool {
+	host.to_lowercase()
+		.ends_with(".mail.protection.outlook.com.")
+}