Yahoo rejects my email messages, due to DMARC problem

Question

I have two free Microsoft email addresses, ******@OUTLOOK.COM and ******@LIVE.CA. Starting Thu Feb 1, I found that emails sent to Yahoo or Gmail from either domain failed the DMARC check. That is, Yahoo postmaster rejects my emails, see below. Apparently more than 5000 individuals use OUTLOOK.COM to send emails each day, so all people with emails in this domain count as "bulk senders".

When will Microsoft update the DMARC records for these domains?

I went to SkySnag to check my email accounts, at https://www.skysnag.com/domain-results/?domain=******@OUTLOOK.COM/ It shows that the SPF check passes, but the DMARC check fails.

According to the website https://dmarcian.com/domain-checker/?domain=OUTLOOK.COM ...

You have a valid DMARC record that provides visibility into the entirety of your email program(s) and helps ensure you meet email sending best practices. Your domain however is not fully protected against abuse as it does not take full advantage of the protections afforded by DMARC. SPF, DKIM, and DMARC records live in your domain's DNS and are used by mailbox providers to separate legitimate email from abuse. Based on your DMARC policy, receivers are currently not able to block fraudulent emails that mimic your domain.

My attempt to send email on Feb 1 was bounced with this error message. I got a similar response earlier this morning.

The original message was received at Thu, 1 Feb 2024 12:30:35 -0500 from

mail-bn7nam10olkn2019.outbound.protection.outlook.com [40.92.40.19]

----- The following addresses had permanent fatal errors -----

(reason: 554 [RL02] Message content not accepted for policy reasons; see https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpostmaster.yahooinc.com%2Ferror-codes&data=05%7C02%7C%7C5cc36e16757e441f64a308dc234b8184%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638424054408726364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=0pd5jE%2F2dcV6a2%2BLWgF%2BILGyEsdb1z24CP%2BKGuNK2qY%3D&reserved=0

UPDATE, I did some more testing this morning.

Sent:

On Monday, February 5, 2024 at 09:31:11 a.m. EST, <******@LIVE.CA> wrote:

. Test whether Yahoo is still rejecting emails from LIVE.CA (and OUTLOOK.COM) due to DMARC issue.

Reply:

On Monday, February 5, 2024 at 09:36:13 a.m. EST, <******@YAHOO.COM> wrote:

. This confirms that ******@YAHOO.COM received this test message from ******@LIVE.CA, so evidently Yahoo postmaster is no longer blocking emails from LIVE.CA due to the DMARC issue. NOTE: the similar message from ******@OUTLOOK.COM has not been delivered to the ******@YAHOO.COM inbox, and ******@OUTLOOK.COM has not received an "email bounced" message.

Answer 1

Duplicate post

Answer 2

This is NOT a duplicate post.
Hey Palcouk, You told me to post my question on Community under topic=Outlook, which is what I did.

Update: My email at YAHOO.COM is not receiving emails from my address at OUTLOOK.COM. My Yahoo email is receiving emails from my address at LIVE.CA, so at least now I can use the address in LIVE.CA domain to send emails to everyone (Yahoo, Gmail, Microsoft).

Answer 3

That may not be DMARC problem. IP address 40.92.40.19 is on DNSBL (blacklist).

Answer 4

Um, how can I resolve this problem? I use email in domain OUTLOOK.COM and it sends my outbound emails via the server at this IP address. How can I resolve the DNSBL problem, or the DMARC problem that Dmarcian website has reported? Do I give up using my email address in OUTLOOK.COM..? Has anyone else had this problem?

Answer 5

Many of Microsoft's mail server IP addresses are listed on DNSBL. It isn't something for you to fix. Microsoft is responsible for fixing their IP reputation. The same goes for DMARC. If you use a custom domain name (not outlook.com), DMARC and other DNS records become your responsibility.