fix(core): Fix hotmail/outlook checks

core/src/smtp/outlook/mod.rs

@@ -4,9 +4,12 @@ pub mod microsoft365;
 
 /// Check if a MX host is from outlook (includes @hotmail.*, @outlook.* and
 /// all Microsoft 365 addresses).
+///
+/// After some testing I got:
+/// - @outlook.* and @hotmail.* -> end with ".olc.protection.outlook.com."
+/// - Microsoft 365 emails -> end with ".mail.protection.outlook.com."
 pub fn is_outlook(host: &str) -> bool {
-	host.to_lowercase()
-		.ends_with(".mail.protection.outlook.com.")
+	host.to_lowercase().ends_with(".protection.outlook.com.")
 }
 
 /// Check if a MX host is an @hotmail.* or @outlook.* email.
@@ -18,8 +21,10 @@ pub fn is_outlook(host: &str) -> bool {
 /// - *@hotmail.fr -> `eur.olc.protection.outlook.com.`
 /// - *@hotmail.nl -> `eur.olc.protection.outlook.com.`
 ///
+/// But Microsoft 365 addresses end with "mail.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.")
+		.ends_with(".olc.protection.outlook.com.")
 }