RCPT TO:<******@****.***>
DATA
From: ******@****.***
To: ******@****.***
Subject: Hooray for Go

Line 1
..Leading dot line .
Goodbye.
.
QUIT
`

func TestExtensions(t *testing.T) {
	fake := func(server string) (c *Client, bcmdbuf *bufio.Writer, cmdbuf *strings.Builder) {
		server = strings.Join(strings.Split(server, "\n"), "\r\n")

		cmdbuf = &strings.Builder{}