Sending group email results in Error is [0x80004005-0x00000b22-0x00000501].

Question

I can send email to one person at a time with my outlook.com account, but when I send a group email I get error code-- Error is [0x80004005-0x00000b22-0x00000501]. What now?

Answer 1

Hello,

Thank you for reching out and sorry about the problem you are having sending group email. If none of the above fixes work This may point to.

• Mailbox Almost Full If your Outlook.com storage or local Outlook data file is nearly full, emails, especially group messages, can fail to send. Outlook needs space to store and sync sent messages, and if there’s no room, errors like 0x80004005 can appear. What you can try: Check Storage in Outlook Web settings, then clear Deleted Items, Sent Items, Junk, or large attachments. A quick cleanup often helps more than expected.
• Internet Connection Issues An unstable connection can interrupt the sending process. Group emails go through more server checks, so even a brief drop can trigger a send error. What you can try: Switch networks (Wi-Fi to hotspot or vice versa), restart your router, or try sending from the Outlook web version to compare.
• Corrupted Outlook Profile Your Outlook profile stores your account settings and data file paths. If it becomes damaged, sending, especially to multiple recipients, may fail. What you can try: Go to Control Panel > Mail > Show Profiles > Add, then reconnect your account. It may sound technical, but it’s usually quick to set up.
• Antivirus Interference Some antivirus programs block Outlook background processes like syncing, validating addresses, or preparing attachments. That can stop emails during the send stage. What you can try: Temporarily disable email scanning or script-blocking in your antivirus, restart Outlook, and test again. If it works, you may just need to update or adjust the antivirus settings.

Hope that these additional information helps you out. If you need further assistance or if you have questions just leave a comment below.

Thank you,

Answer 2

The error code [0x80004005-0x00000b22-0x00000501] that you are encountering when trying to send group emails in Outlook can be related to several issues, including problems with the address book or limitations on sending emails to multiple recipients.

Here are a few steps you can take to troubleshoot this issue:

1. Update the Address Book: Make sure your Outlook address book is up to date. You can do this by going to the Send/Receive tab, selecting the down arrow next to Send/Receive Groups, and then choosing Download Address Book.
2. Check Recipient Limits: Ensure that you are not exceeding the maximum number of recipients allowed in a single email. If you are trying to send to a large group, consider reducing the number of recipients or sending the email in smaller batches.
3. Use Distribution Lists: If you are using a personal distribution list, try using a Microsoft 365 Group instead, as personal distribution lists can sometimes cause issues when sending to multiple recipients.
4. Delete Offline Address Books: If the issue persists, try deleting the contents of the Offline Address Books folder. This can help resolve issues related to outdated or corrupted address book entries.

If these steps do not resolve the issue, you may want to consult the Microsoft Community for further assistance.

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References:

• This message could not be sent NDR when an approved user sends mail in Microsoft 365
• Errors when sending emails from security groups, distribution lists, or mail-enabled Public Folders in Outlook for Mac
• "Too many users" error when adding many recipients to encrypted email
• The operation failed error when you send email messages in Outlook
• This message could not be sent NDR when an approved user sends mail in Microsoft 365
• Errors when sending emails from security groups, distribution lists, or mail-enabled Public Folders in Outlook for Mac