No, we do not advertise pipelining.. for most NTA's, (that is old school
back in the days of slow internet), since most modern MTA might attempt
to reject at any stage, to free up connections more quickly..
And yes, we still take responsibility for delivering, it just adds noise
in the logs unneccesarily, but you figure ESP's would be more
friendly in their behavior..
PS, on the subject of ESP's.. what is the deal with so many bad
certificates from ESP's..
On 2026-06-23 03:00, Andrew C Aitchison via mailop wrote:
On Mon, 22 Jun 2026, Michael Peddemors via mailop wrote:
Getting a lot more cases of timeout after DATA..
Seems they send the DATA, but after this we don't see any QUIT
issued.. well, at least not until the timeout on connection expires..
It's after we send the 250 OK in response to the DATA..
Just curious.. Are they just terminating without sending waiting for
the OK, or just sending the QUIT?
It should not matter (since RFC 2920 says DATA can only appear as the
last command in a group) but are you advertising PIPELINING and are they
using it ?
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