Fix e-mail delivery to Microsoft services (read all before applying)
Budget: $30 – $250 USD
Business messages between end users (ie. not campaign, not newsletter and not transactional) from a dedicated server hosted by OVH are being censored/discriminated by Microsoft e-mail services as junk even when the Outlook.com Deliverability Support Team says "We have investigated your IP (xxx.xxx.xx.xx/30) and do not see anything offhand that would be preventing your mail from reaching our customers."
Result in www.mail-tester.com is 10/10. MXtoolbox results are ok. No problems delivering to other ESPs.
There are not tests to be done or time wasted. You must be able interact directly with Microsoft to solve this.
IMPORTANT CONDITIONS AND NOTES:
1 - Server is Linux (Postfix) and hosted by OVH (ASN 16276) with a /30 IP block.
2 - No DNS/DMARC/DKIM/PTR/SPF issues and delivery is 100% inbox for all other ESP.
3 - No incidents/reports from any feedback loop or Microsoft Junk Mail Reporting Program.
4 - IP reputation is good with exception of UCE Level 3 but even when it was whitelisted the messages were still being delivered to the Junk Folder (even blank messages with no content).
5 - We cannot change IP block , hosting service or use relaying service (due to compliance and contract).
6 - It is highly recommended to have an Exchange Online or Office 365 enterprise service account to receive test messages that could be forwarded to Microsoft submission portal (https://security.microsoft.com/reportsubmission) as false positive and send a report of submissions to us.
7 - You must be able to solve this directly with Microsoft while sending copies of e-mails, chat and calls to us.
8 - This isssue affects e-mail recipients hosted by Microsoft e-mail services (365/Exchange/Outlook) for third parties that we have no control and must be resolved globally for all cases (ie. not just fix it for destination1.com or destination2.com).
9 - IP certification from Validity/Return-Path is not accepted for corporate messages sent between end-users so this recommendation is not acceptable.
10 - Milestone will not be released until the problem is fixed by them or they release a public statement on this.
Thank you.
References:
https://www.nerd-quickies.net/2020/10/20/microsoft-silently-dropping-emails-a-sad-but-true-story/
https://answers.microsoft.com/en-us/outlook_com/forum/all/mail-sent-to-hotmail-outlook-accounts-gets-junked/ed9628b8-5837-4e65-8102-d0da4a907ea5
https://answers.microsoft.com/en-us/outlook_com/forum/all/mail-not-received-outlookcom-response-to-sending/fd4211a6-c8e6-41fb-a94e-8254706f2ec1
https://social.technet.microsoft.com/Forums/msonline/en-US/9dfcf4e1-d068-44e4-b40b-33de33cfb9b9/office-365-and-outlookcom-denies-our-emails-and-some-disappear?forum=onlineservicesexchange
https://answers.microsoft.com/en-us/outlook_com/forum/all/why-my-messages-to-my-outlookcom-never-arrive/b2339d47-7cba-4db2-9339-cff999ff5cba
https://answers.microsoft.com/en-us/outlook_com/forum/all/how-do-i-escalate-being-un-blacklisted-for/483acefd-678e-4348-96d6-99785c4dc92b
https://answers.microsoft.com/en-us/msoffice/forum/all/problem-sending-e-mail-to-office-365exchange/59e56c3e-e14b-47e7-bce3-764687c8e2d6
https://answers.microsoft.com/en-us/outlook_com/forum/all/our-emails-are-being-blocked-intermittently-by/5b628c9c-0f9d-4e2e-8419-029fa97067b4
Result in www.mail-tester.com is 10/10. MXtoolbox results are ok. No problems delivering to other ESPs.
There are not tests to be done or time wasted. You must be able interact directly with Microsoft to solve this.
IMPORTANT CONDITIONS AND NOTES:
1 - Server is Linux (Postfix) and hosted by OVH (ASN 16276) with a /30 IP block.
2 - No DNS/DMARC/DKIM/PTR/SPF issues and delivery is 100% inbox for all other ESP.
3 - No incidents/reports from any feedback loop or Microsoft Junk Mail Reporting Program.
4 - IP reputation is good with exception of UCE Level 3 but even when it was whitelisted the messages were still being delivered to the Junk Folder (even blank messages with no content).
5 - We cannot change IP block , hosting service or use relaying service (due to compliance and contract).
6 - It is highly recommended to have an Exchange Online or Office 365 enterprise service account to receive test messages that could be forwarded to Microsoft submission portal (https://security.microsoft.com/reportsubmission) as false positive and send a report of submissions to us.
7 - You must be able to solve this directly with Microsoft while sending copies of e-mails, chat and calls to us.
8 - This isssue affects e-mail recipients hosted by Microsoft e-mail services (365/Exchange/Outlook) for third parties that we have no control and must be resolved globally for all cases (ie. not just fix it for destination1.com or destination2.com).
9 - IP certification from Validity/Return-Path is not accepted for corporate messages sent between end-users so this recommendation is not acceptable.
10 - Milestone will not be released until the problem is fixed by them or they release a public statement on this.
Thank you.
References:
https://www.nerd-quickies.net/2020/10/20/microsoft-silently-dropping-emails-a-sad-but-true-story/
https://answers.microsoft.com/en-us/outlook_com/forum/all/mail-sent-to-hotmail-outlook-accounts-gets-junked/ed9628b8-5837-4e65-8102-d0da4a907ea5
https://answers.microsoft.com/en-us/outlook_com/forum/all/mail-not-received-outlookcom-response-to-sending/fd4211a6-c8e6-41fb-a94e-8254706f2ec1
https://social.technet.microsoft.com/Forums/msonline/en-US/9dfcf4e1-d068-44e4-b40b-33de33cfb9b9/office-365-and-outlookcom-denies-our-emails-and-some-disappear?forum=onlineservicesexchange
https://answers.microsoft.com/en-us/outlook_com/forum/all/why-my-messages-to-my-outlookcom-never-arrive/b2339d47-7cba-4db2-9339-cff999ff5cba
https://answers.microsoft.com/en-us/outlook_com/forum/all/how-do-i-escalate-being-un-blacklisted-for/483acefd-678e-4348-96d6-99785c4dc92b
https://answers.microsoft.com/en-us/msoffice/forum/all/problem-sending-e-mail-to-office-365exchange/59e56c3e-e14b-47e7-bce3-764687c8e2d6
https://answers.microsoft.com/en-us/outlook_com/forum/all/our-emails-are-being-blocked-intermittently-by/5b628c9c-0f9d-4e2e-8419-029fa97067b4