diff --git a/chatmaild/src/chatmaild/config.py b/chatmaild/src/chatmaild/config.py
index 09085742..cf408759 100644
--- a/chatmaild/src/chatmaild/config.py
+++ b/chatmaild/src/chatmaild/config.py
@@ -31,7 +31,7 @@ class Config:
         self.max_user_send_per_minute = int(params.pop("max_user_send_per_minute", 60))
         self.max_user_send_burst_size = int(params.pop("max_user_send_burst_size", 10))
         self.max_mailbox_size = params.pop("max_mailbox_size", "500M")
-        self.max_message_size = int(params.pop("max_message_size", 31457280))
+        self.max_message_size = int(params.pop("max_message_size", 52428800))
         self.delete_mails_after = params.pop("delete_mails_after", "20")
         self.delete_large_after = params.pop("delete_large_after", "7")
         self.delete_inactive_users_after = int(
diff --git a/chatmaild/src/chatmaild/ini/chatmail.ini.f b/chatmaild/src/chatmaild/ini/chatmail.ini.f
index 7badf55b..bd164a7f 100644
--- a/chatmaild/src/chatmaild/ini/chatmail.ini.f
+++ b/chatmaild/src/chatmaild/ini/chatmail.ini.f
@@ -22,7 +22,7 @@ mail_domain = {mail_domain}
 #max_mailbox_size = 500M
 
 # maximum message size for an e-mail in bytes
-#max_message_size = 31457280
+#max_message_size = 52428800
 
 # days after which mails are unconditionally deleted
 #delete_mails_after = 20