Yeah, an extremely bad reputation can do that at Outlook.com. Are the open rates really low for emails sent from this or those IPs?
-- Benjamin From: mailop <mailop-boun...@mailop.org> On Behalf Of Ricardo Signes Sent: vendredi 29 mars 2019 15:02 To: mailop@mailop.org Subject: [mailop] mail to Outlook accepted, then vanishing Hiya, Lately, we're seeing a lot of mail from us (FastMail) being accepted by Outlook[.com], but then never reaching its destination inbox. It's not in a junk folder or somewhere else. It seems like Outlook is accepting the mail and then dropping it on the floor somewhere. Obviously, this isn't great for out users. Here's an example SMTP interaction between us and Outlook: 2019-03-29T09:44:11-04:00 gateway2 postfix-out/smtp[3294666]: A421222096: to=<operatester...@outlook.com<mailto:operatester...@outlook.com>>, relay=outlook-com.olc.protection.outlook.com[104.47.1.33]:25, delay=2.3, delays=0.05/0/0.69/1.5, dsn=2.6.0, status=sent (250 2.6.0 <c6883afe-2d47-40b2-be0d-73b897c7f...@beta.fastmail.com<mailto:c6883afe-2d47-40b2-be0d-73b897c7f...@beta.fastmail.com>> [InternalId=18708877624108, Hostname=VE1EUR01HT199.eop-EUR01.prod.protection.outlook.com] 10961 bytes in 0.465, 23.013 KB/sec Queued mail for delivery -> 250 2.1.5) We've filed a ticket, but I don't think we've had any response, and it's a scary problem, since we can't detect anything to tell users. Anybody know what can cause this behavior? -- Ricardo Signes (rjbs) Postmaster, FastMail
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