diff --git a/plinth/modules/email_server/postconf.py b/plinth/modules/email_server/postconf.py
index 59b80d19a..4762bd522 100644
--- a/plinth/modules/email_server/postconf.py
+++ b/plinth/modules/email_server/postconf.py
@@ -71,7 +71,7 @@ def set_master_cf_options(service_flags, options):
 def get_unsafe(key):
     """Get postconf value (no locking, no sanitization)"""
     result = _run(['/sbin/postconf', key])
-    match = key + ' = '
+    match = key + ' ='
     if not result.startswith(match):
         raise KeyError(key)
     return result[len(match):].strip()