> On Sep 3, 2018, at 10:45 AM, Wietse Venema <[email protected]> wrote:
>
> 2) Exim sends BDAT after RCPT is rejected. That is a protocol error.
> There is no pipelining error, because Exim did not pipeline BDAT
> after RCPT. postscreen did not log "command pipelining after RCPT".
It is perhaps possible that Exim sent BDAT separately from RCPT
with a consequent Nagle delay, so that Postfix saw just RCPT TO,
but BDAT was sent before Exim saw (or bothered to read the response
for) the rejected recipient.
It is also possible that the Exim version in question is out of date,
I recall seeing various bug reports on the Exim-users list about the
CHUNKING support in Exim, even some security issues. Don't know whether
the same symptoms are to be expected from a fully-patched version.
--
Viktor.
