On 2021-10-22, Viktor Dukhovni via Exim-dev <exim-dev@???> wrote:
>> On 22 Oct 2021, at 11:45 am, admin--- via Exim-dev <exim-dev@???> wrote:
>>
>> For what it's worth, by experience, you should avoid sending anything to any
>> yahoo domains using pipelining. They will just retaliate on you if you do it,
>> they will, for example, greylist the servers using pipelining but will allow
>> the other ones.
>> If this is really an exim bug, it's still worth correcting it, but you should
>> really disable pipelining to yahoo, even when this bug will be resolved.
>
> Why would they bother advertising PIPELINING, if they don't
> actually mean to tolerate its use? That does not seem right...
>
BINARYMIME
RFC3030 (
https://datatracker.ietf.org/doc/html/rfc3030#section-4.2)
doesn't show pipelined BDAT: the sender synchronises before sending
body data. Dropping the connection seems like a resonable response
to such a synchronisation error.
PIPELINING
RFC2920 (
https://datatracker.ietf.org/doc/html/rfc2920)
synchrionises the pipeline before any message content is trasmitted
(the "DATA" command is allowed but the sender must wait for "354"
before sending content)
--
Jasen.
