To help protect Microsoft Outlook customers from fraud or abuse, we sometimes block accounts from sending email. This usually happens when a message triggers our junk filters or if an account exceeds the daily limit for sending email. Here are the most common errors that you might see and what you can do to fix the problem.
Email messages get blocked when the content of the message looks like junk email. Occasionally, legitimate email can get marked as junk. If your message is blocked, try the following:
Change the content of your message to make it look less suspicious, and then try sending it again.
Go to the Add a phone webpage to verify your account with a mobile phone number. After you enter your phone number, we'll send you a text message with a verification code that you can use to unblock your account. This helps us verify that you're the owner of the account and not a spammer.
If these steps don't work, contact support for help.
Outlook.com limits the number of email messages you can send in one day. The limits are used to deter spammers and to help reduce the amount of spam you receive in your inbox.
The limit is lower for emails sent from your mobile device via EAS or POP. To send an email you've written on your mobile device:
Save the message as a draft so you don’t lose it.
Sign into Outlook.com on your PC, open the draft and click Send.
If you reach your daily limit for mail sent via the web, try the following:
Save your current message as a draft so you don’t lose it.
Increase your daily message limit to the maximum by going to the add a phone webpage and verifying your account with a mobile phone number.
If you can't verify your account, contact support for help.
To reduce the amount of junk being sent from Outlook accounts, we limit the number of recipients that you can send a message to at one time. If you receive an error, try the following:
The error message will tell you how many recipients you can send a message to. Remove some recipients from your email so you're under the limit, and then try sending it again.
Increase your recipient limit by going to the Add a phone webpage and verifying your account with a mobile phone number.
If you request that we send a code to your mobile phone, keep in mind that text message delivery isn't available in all countries or regions, or from all providers.
Text message delivery is subject to network delays, so it might take a few minutes to receive your code. If you've waited more than 15 minutes and haven't received the code, try requesting another code.
To prevent abuse of Outlook, we limit the number of times you can request a code each day. If you've reached the limit, you'll need to wait 24 hours before you can request a new code.
Simple instructions for common tasks.Outlook.com basics
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