how to fix the problem

Question

how to fix the problem

UPRSA UPRSA 0

Technical details

MessageDeliveryFailedException: Could not deliver the message [len=70, 
Failure code: ad29

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1 answer

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Answer 1

Alvise Cervellati 6,455 Independent Advisor

Hi @UPRSA UPRSA , Welcome in Community

This error typically occurs in Microsoft Outlook (such as the New Outlook for Windows or Outlook client) when an outgoing email gets stuck in your Outbox or Drafts and fails to transmit via your mail server.

Can you try via webmail if you can send successfully the email?

Then, go offline (turn off your Wi-Fi or select Work Offline in Outlook), open your Outbox, and either delete the stuck message or move it to your Drafts. Then, go back online and try sending a fresh, simple test email.

See if in this way the email can be sent normally

Let me know how it goes

Elvis

Lenka Milaberská 0 Reputation points

2026-09-02T10:58:16.1233333+00:00

Hi, I have the same issue. The solution you recommended is not helping in my case. I even tried to delete my mail account from otlook and add it again, no difference. Sending mail from webmail works, from outlook on mobile as well. What should I do next?
Hornblower409 14,260 Reputation points

2026-09-03T14:02:42.5166667+00:00

@Lenka Milaberská said

I have the same issue. The solution you recommended is not helping

I understand that you have an issue similar to the one discussed in this thread. But you will probably not get any help for your issue by adding to an old post.

I would suggest that you start a new thread using the "Ask a question" button at the top of this page to create a new Question and include the details for your specific problem and what steps you have already tried to fix it.

This provides much higher visibility to your issue than adding on to an existing post, which is only seen by people who are already following this question.

(You can put the link for this page in your new Question for reference)