Improve draft

doc/draft.md

@@ -12,6 +12,18 @@ $ export RUSTFLAGS="--cfg tokio_unstable"
 $ cargo run --example simple
 ```
 
+- Test it manually
+
+Theoretically, IMAP server expected end of lines with `\r\n` but implementations are more liberal.
+To check with `\r\n`, use the `socat` command line.
+The `nc` command line will send only `\n` when run on Linux, our current implementation supports it.
+
+```
+$ socat readline tcp4:127.0.0.1:4567,crnl
+$ nc 127.0.0.1 4567
+```
+
+
 - [Basic python testing script](../scripts/test_imap.py)
 
 ```shell