Hi Michael / MailOp, We're seeing a LOT of our customers emails going to spam when being sent to Hotmail, most of the time with the following error:
*TempError (protection.outlook.com <http://protection.outlook.com>: error in processing during lookup of <DOMAIN>: DNS Timeout)* Their SPF record is fine, it includes ALL of the outgoing IPs that we use, and this has happened on domains using different DNS clusters in different locations (including Cloudflare's DNS). I've Google'd this error and either found unanswered Microsoft forum posts, or people saying to add the mail servers IP to the SPF (which I've done, same result). Our outgoing IPs aren't on any public blacklists obviously, and don't seem to have a bad reputation in SNDS. We have emailed Hotmail's support <https://support.microsoft.com/en-us/getsupport?oaspworkflow=start_1.0.0.0&wfname=capsub&productkey=edfsmsbl3&ccsid=635701890986028985&forceorigin=esmc> dozens of times in the past, they are beyond useless - assuming they're even people, from what I can tell they're just copy and paste bots. Using https://www.mail-tester.com to test my domains SPF / DKIM / domain reputation / blacklists, etc, I scored *10/10*, yet seconds later when I email my test Hotmail, it goes straight to Junk with no valid reason. Can ANYONE provide some more information on what this error means? As far as I can see, with the test domains that I'm using there should *zero* reason for them to go to Junk. If anyone from Microsoft *that can actually help *could contact me off list so I can provide specific examples, that would be great. Thanks.
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