Fix default port number information
diff --git a/ChangeLog b/ChangeLog
index b39b953..ac04588 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,8 @@
      previously lead to a stack overflow on constrained targets.
    * Add `MBEDTLS_SELF_TEST` for the mbedtls_self_test functions
      in the header files, which missed the precompilation check. #971
+   * Fix incorrect default port number in ssl_mail_client example's usage.
+     Found and fixed by irwir. #2337
 
 = mbed TLS 2.16.0 branch released 2018-12-21