[exim] possible bug in smtp reply after dot

Hi!

I found possible bug in smtp session when user telling dot and not waiting for
server reply:

%telnet mail.*.ru 25
Trying 217.*
Connected to mail.*.ru.
Escape character is '^]'.
220-mail.*.ru ESMTP greeting you...
220-Strongly recomended to use the fully-qualified domain name (FQDN) of the
SMTP client
220-or address literal in the EHLO/HELO command.
220 Otherwise your host address will be listed in black list.
ehlo xz.ru
250-mail.*.ru Hello *
250-SIZE 10485760
250-8BITMIME
250-AUTH CRAM-MD5
250-STARTTLS
250 HELP
mail from: <>
250 OK
rcpt to: <h-k@*.ru>
250 Accepted
data
354 Enter message, ending with "." on a line by itself
quit
^C
.
^]

^C

as result email accepted and passed to user mailbox.
or it bug into telnet program? i think that client should wait for finaly
decision MTA accetp mail or not, here we just not wait - it may be user in
various spam-mailig software.
can anyone tell something about this problem?