Fix e-mail delivery to Office 365 customers (broadly)

Cancelled Posted 2 years ago Paid on delivery
Cancelled Paid on delivery

Regular e-mail messages (replies to inquires, contracts, etc) from a small business dedicated self-hosted e-mail server (running Linux) to recipients that happen to use Microsoft Office 365 e-mail service are going to the Junk folder with SCL 5.

Please note that I´m not a Office 365 service user and just run a server for small business that users send regular legitimate e-mail messages to some addresses that unfortunately use their service which seens to have a lot of problems.

Requirement: You must be able to open a case with Microsoft and do interposition for us escalating it to their highest level asking why their IP mitigation done by their Outlook Delivery Support Team is not propagating to their Office 365 customers (broadly speaking and not just your domain or tenant so forget answers about adding the sending domains to safe-sender list, creating policies, etc) and what can be done in this specific case to solve the problem. No fancy technical skills required for this.

Important information (please read before applying to the project):

1. DNS, DKIM, DMARC, MTA-TLS and SPF records are fine and passes all checks (this includes [login to view URL] with 10/10, green at [login to view URL] and even DANE checks).

2. The IP block (/30) is clean on all major blocklists (DNSBL, RBLs, [login to view URL]), already mitigated by the [login to view URL] delivery support, normal status at SNDs and zero complaints from feedback loops.

3. E-mail client (Canary, Exim, Thunderbird, etc), message content (it can be a simple text message), DNS records and source domain does not affect the results. In all cases it works fine for every other e-mail service including the free [login to view URL] (which the IP block is mitigated by Microsoft) but not for their Office 365 e-mail service customers.

4. This not e-mail marketing or automated responses of anykind (subscription lists, transactional, etc). Just plain and simple regular business e-mail replies in a self-hosted dedicated e-mail server (non-shared IP block) running Linux and Postfix.

5. Remember: Relaxing DMARC policy (to none), removing MTA-TLS, disabling DANE, relaxing SPF records (~all), changing domain or messing-up with PTR records does NOT change the outcome.

6. Already have opened over 15 tickets with Outlook Delivery Support. Their mitigation only seens to affect the free service ([login to view URL], [login to view URL], [login to view URL], etc).

Sample diagnostic headers:

Authentication-Results: spf=pass (sender IP is [login to view URL]) smtp.mailfrom=[login to view URL]; [login to view URL]; dkim=pass (signature was verified) header.d=[login to view URL];[login to view URL]; dmarc=pass action=none header.from=[login to view URL];compauth=pass reason=100

Received-SPF: Pass ([login to view URL]: domain of [login to view URL] designates [login to view URL] as permitted sender) receiver=[login to view URL]; client-ip=[login to view URL]; helo=[login to view URL];

X-EOPAttributedMessage: 0

X-MS-Exchange-Organization-MessageDirectionality: Incoming

X-MS-PublicTrafficType: Email

X-MS-Office365-Filtering-Correlation-Id: cec712cd-2826-4c0b-a328-08d92826ac4c

X-MS-TrafficTypeDiagnostic: PR3P191MB1309:

X-MS-Oob-TLC-OOBClassifiers: OLM:2733;

X-MS-Exchange-Organization-SCL:5

X-Forefront-Antispam-Report: CIP:[login to view URL];CTRY:CA;LANG:pt;SCL:5;SRV:;IPV:NLI;SFV:SPM;H:[login to view URL];PTR:[login to view URL];CAT:SPM;SFS:(47610400004)(47540400005)(6966003)(4326008)(22186003)(31696002)(356005)(1096003)(6916009)(36916002)(45080400002)(6266002)(58800400005)(107886003)(7246003)(5660300002)(36756003)(26005)(8676002)(86362001)(52230400001)(83380400001)(66574015)(7636003)(31686004)(7126003)(7596003)(336012)(2616005)(44180200023);DIR:INB;

X-Microsoft-Antispam: BCL:0;

X-Microsoft-Antispam-Mailbox-Delivery: ucf:0;jmr:1;auth:0;dest:J;ENG:(20160513016)(750129)(520011016)(944506458)(944626604);

NOTE: Solutions proposing relaying the Postfix traffic using a third party mailer (Google, Mailchimp, Sendgrid, etc), changing the outbound IP or messing with DNS records (remember DKIM/DMARC/SPF are fine) are not acceptable

Microsoft Exchange Email Handling Office 365 Customer Support

Project ID: #30467327

About the project

5 proposals Remote project Active 2 years ago

5 freelancers are bidding on average $135 for this job

imwassu1215

i Would like to work with you because in past i was recently worked on similar project hope you you reply soon

$56 USD in 10 days
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ImtiyazAliJafri1

Greetings of the day, I have 4+ years of experience in Office 365, including one drive, Skype for business, Yammer, and SharePoint. I am also well-versed with all the Cloud Technologies like; Office 365/ADFS/Dir. Synch More

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Soniriy989

I will create a world class clickable email signature.i shall create very good and eye catching clickable Email signature.i am very honest and dependable person.

$30 USD in 1 day
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terrius15

i ready to work had knowledge of things which you required thanking you ...................................

$140 USD in 7 days
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