diff --git a/management/dns_update.py b/management/dns_update.py
index dc678a25..eee99dc3 100755
--- a/management/dns_update.py
+++ b/management/dns_update.py
@@ -231,10 +231,7 @@ def build_zone(domain, domain_properties, additional_records, env, is_zone=True)
 
 	has_rec_base = list(records) # clone current state
 	def has_rec(qname, rtype, prefix=None):
-		for rec in has_rec_base:
-			if rec[0] == qname and rec[1] == rtype and (prefix is None or rec[2].startswith(prefix)):
-				return True
-		return False
+		return any(rec[0] == qname and rec[1] == rtype and (prefix is None or rec[2].startswith(prefix)) for rec in has_rec_base)
 
 	# The user may set other records that don't conflict with our settings.
 	# Don't put any TXT records above this line, or it'll prevent any custom TXT records.
diff --git a/management/mailconfig.py b/management/mailconfig.py
index 8b98de6e..8705d56a 100755
--- a/management/mailconfig.py
+++ b/management/mailconfig.py
@@ -86,10 +86,7 @@ def prettify_idn_email_address(email):
 
 def is_dcv_address(email):
 	email = email.lower()
-	for localpart in ("admin", "administrator", "postmaster", "hostmaster", "webmaster", "abuse"):
-		if email.startswith((localpart + "@", localpart + "+")):
-			return True
-	return False
+	return any(email.startswith((localpart + "@", localpart + "+")) for localpart in ("admin", "administrator", "postmaster", "hostmaster", "webmaster", "abuse"))
 
 def open_database(env, with_connection=False):
 	conn = sqlite3.connect(env["STORAGE_ROOT"] + "/mail/users.sqlite")