diff --git a/Src/SmtpServer/Protocol/DataCommand.cs b/Src/SmtpServer/Protocol/DataCommand.cs
index 0092370..b30ce23 100644
--- a/Src/SmtpServer/Protocol/DataCommand.cs
+++ b/Src/SmtpServer/Protocol/DataCommand.cs
@@ -58,9 +58,14 @@ await context.Pipe.Input.ReadDotBlockAsync(
                     
                 await context.Pipe.Output.WriteReplyAsync(response, cancellationToken).ConfigureAwait(false);
             }
+            catch (SmtpResponseException)
+            {
+                return false;
+            }
             catch (Exception)
             {
                 await context.Pipe.Output.WriteReplyAsync(new SmtpResponse(SmtpReplyCode.TransactionFailed), cancellationToken).ConfigureAwait(false);
+                return false;
             }
 
             return true;