I am having issue that Yahoo emails are not reaching recipients.

Anonymous
2024-01-07T08:27:47+00:00

I am having issue that Yahoo emails are not reaching recipients. I am getting an error message but after 24hrs not even straight after. It's only come to my attention because in follow up calls, they are telling me that the emails never arrived..

Please advise me how to sort it out as is very important I can reach those yahoo recipients.

Your message couldn't be delivered. Despite repeated attempts to contact the recipient's email system it didn't respond.

Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that their email system isn't accepting connection requests from your email system. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem.

For more information and tips to fix this issue see this article: https://go.microsoft.com/fwlink/?LinkId=389361.

Outlook | Windows | Classic Outlook for Windows | For business

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

147 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. Anonymous
    2024-03-13T22:49:22+00:00

    Of course, you can always add an SPF record on an in-house server but it's completely redundant. There's no reason to look up an SPF when the reverse PTR matches the sender's domain. That's how Yahoo knows that Microsoft (or any other third party) is sending the email on behalf of the sender. When it doesn't match, that's when the SPF is needed. A properly configured in-house server has a static IP along with a reverse PTR. Adding an SPF isn't necessary.

    Most of the issues that occurred earlier this year (and some still) affect domains using third party servers without a proper SPF. According to all three major free email services, AOL, Gmail and Yahoo, the DMARC and DKIM requirements are still specified for companies that send more than 5000 emails/day. In fact, I tested multiple Microsoft account domains without DMARC - just SPF and DKIM and the email is received fine. Sent O365 mail to Gmail with just SPF successfully as well.

    There's no consistency with Yahoo/AOL's new requirement. If they're considering Microsoft 'bulk' then why doesn't mail bounce without DMARC? Why doesn't Gmail bounce without DKIM or DMARC?

    I miss the days when you can have an open SMTP server and nobody abused it.

    Was this answer helpful?

    0 comments
  2. Ron-6928 4,991 Reputation points
    2024-03-13T23:01:26+00:00

    Instead of figuring out what record they require, just create all 3 and be done with it. The same goes with SPF regardless of where your mail host is (cloud or on premise). Besides that, getting your ISP to change the static IP reverse lookup (PTR) is not that easy. It's easier to create an SPF record.

    Yes it was simpler back then, an MX record is all you need and all SMTP servers were open relays but very few abused it. Look on the bright side, SMTP servers are a lot more secure today compared to 25+ years ago.

    Was this answer helpful?

    0 comments
  3. Anonymous
    2024-03-16T15:07:00+00:00

    Hi,

    My issue is with emails sent to yahoo addresses through the web based outlook and live.co.uk domain. Assuming this is the blacklisted ip issue in this instance?

    Many thanks

    Was this answer helpful?

    0 comments
  4. Anonymous
    2024-03-16T15:28:13+00:00

    It doesn't matter. The emails are still going out through microsoft's servers.

    Was this answer helpful?

    0 comments
  5. Ron-6928 4,991 Reputation points
    2024-03-18T14:59:43+00:00

    The bounce mail notification should tell you why it is rejected.

    Was this answer helpful?

    0 comments