"250 2.1.5" is specifically meant to tell you the recipient address is accepted, and you'll see that during the SMTP transaction to most any ISP, like: ... mail from: <address> 250 2.1.0 OK [id] *rcpt to: <address>* *250 2.1.5 OK [id] * data 354 Go ahead ...
And you're right that Microsoft also adds "2.1.5" to their delivery response, but *only* when you're sending to one of their freemail domains like hotmail.com. That's interesting to me because if you're sending to a private MS domain, they *don't* ever include 2.1.5 in the response. That's when you start to notice that every response between MS's freemail and private domains includes different codes, from accepted deliveries to bounces. I've assumed it's all an effort to promote a commitment to privacy/autonomy for their paid users, highlighting that a delivery on the server-level is still susceptible to individual domain admin policy. Anyone notice something different? -- Anna Ward Postmarkapp.com On Mon, Dec 3, 2018 at 2:33 PM Alexander Burch <[email protected]> wrote: > A typical Microsoft successfully delivery looks like this at the moment: > > *250 2.6.0* <[email protected]> > [InternalId=33775622235527, Hostname= > DB5E4H82HT026.eop-EUR03.prod.protection.outlook.com] 26376 bytes in > 0.420, 61.327 KB/sec Queued mail for delivery -> *250 2.1.5* > > It begins with 250 2.6.0 and ends with 250 2.1.5. Why are there 2 status > codes? Does the second one provide additional context, maybe something like > "not blackholed"? Or is it just repetitive and therefore insignificant? > > Thanks, > Alex > > > -- > > Alexander Burch > ActiveCampaign / Deliverability Engineer > [email protected] > 1 North Dearborn St Suite 500, Chicago IL, 60602 > <https://www.facebook.com/activecampaign> > <http://www.twitter.com/activecampaign> > <https://www.linkedin.com/company/activecampaign-inc-> > <https://plus.google.com/107063868317743606466> > > <https://www.activecampaign.com/sig/?u=aburch&c=1> > _______________________________________________ > mailop mailing list > [email protected] > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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