I can’t enter the mail address due to failure of delivering a message to other account

tubadeniz2 0 Reputation points
2026-09-20T10:07:22.3233333+00:00

I can not get a correction mail to other personalized e mail adress

Outlook | Web | Outlook on the web for business | Email
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  1. Julie Huynh 3,425 Reputation points Independent Advisor
    2026-09-20T10:31:21.6966667+00:00

    Dear tubadeniz2,

    Good day! Welcome to Microsoft Q&A forum!

    Based on your description, I understand that you are unable to enter the email address of the person you want to send an email to.

    Could you please help me with the following details:

    • What type of account are you using - personal or one provided by your organization?
    • What type of account is the recipient using - a personal account or one provided by an organization? And are they part of the same organization as you?
    • Based on the tags on your question, are you experiencing this issue on Outlook Web? Have you tried sending an email to that person using the Outlook desktop app?
    • Could you describe the issue in more detail? For example, does one computer show the emails while the other does not? If possible, please provide a screenshot of the issue, making sure to mask any personal information.

    Your confirmation would be very helpful in ensuring you receive the most suitable support!

    Any updates you’re able to share would be really helpful. I appreciate your time and look forward to hearing how things are going! 

    Thank you for your time and patience.

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  2. AI answer

    2026-09-20T10:07:38.15+00:00

    If a message cannot be delivered to another email address, the most common fixes are:

    1. Check the recipient address for typos.
    2. Delete the saved address from the To field and remove it from Auto-Complete.
    3. Type the full recipient address again manually, then send the message again.
    4. If the mailbox is reported as Mailbox not found, Invalid mailbox, or User unknown, the address does not exist or has changed. Confirm the correct address with the recipient.
    5. If the error says Mailbox unavailable, wait a short time and try again.
    6. If the message is too large, upload large attachments to OneDrive and send a link instead.
    7. If sending from Outlook or another mail app fails, try sending from Outlook.com.

    If the failure message came from ******@outlook.com, postmaster@microsoft.com, or service.microsoft.com, review the bounce message and look for the Diagnostic information for administrators section. That section usually shows why delivery failed.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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