fix!

Author: novusnota

docs/src/content/docs/book/receive.mdx

@@ -10,7 +10,7 @@ import { Badge } from '@astrojs/starlight/components';
 
 TON is a distributed blockchain, which means that communication between contracts is performed by sending and receiving messages. The most common type of message is the _internal message_ — a message sent from one contract (or a wallet) to another.
 
-Reentrancy of messages is possible — when processing a message, a contract might get another identically composed one. Read more about it here: [Preventing front-running with signature verification](https://docs.tact-lang.org/book/security-best-practices/#preventing-front-running-with-signature-verification).
+Reentrancy of messages is not possible — despite message passing being asynchronous, processing a single message by a single receiver is always synchronous with an exception of [outbound message processing](/book/send#outbound-message-processing). That said, all pending messages in TON Blockchain are publicly visible and an attacker can spam your contract with identically composed messages. Read more how to prevent it here: [Preventing front-running with signature verification](/book/security-best-practices/#preventing-front-running-with-signature-verification).
 
 ## Receive internal messages