diff --git a/app/src/main/java/eu/faircode/email/EmailService.java b/app/src/main/java/eu/faircode/email/EmailService.java
index 0bc78bd7cf..99c72c3fca 100644
--- a/app/src/main/java/eu/faircode/email/EmailService.java
+++ b/app/src/main/java/eu/faircode/email/EmailService.java
@@ -415,6 +415,8 @@ public class EmailService implements AutoCloseable {
             String certificate, String fingerprint) throws MessagingException {
         properties.put("fairemail.server", host);
 
+        DnsHelper.clear(context);
+
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         boolean bind_socket = prefs.getBoolean("bind_socket", false);
         if (bind_socket &&