Unblock user from sending email office 365

To unblock a user from sending emails in Office 365, you can follow these steps:

Method 1: Using the Office 365 Admin Center

  1. Sign in to the Office 365 Admin Center with your admin credentials.
  2. Go to the "Users" section and click on "Active users".
  3. Find the user you want to unblock and click on their name.
  4. Click on the "Mail" tab.
  5. Under "Mail settings", click on "More options".
  6. Scroll down to the "Delivery" section and click on "Edit".
  7. Make sure the "Allow users to send email" toggle switch is turned ON.
  8. Click "Save" to save the changes.

Method 2: Using PowerShell

  1. Open PowerShell and connect to your Office 365 tenant using the following command: Connect-AzureAD
  2. Run the following command to get the user's mailbox: Get-Mailbox -Identity <user's email address>
  3. Run the following command to unblock the user's mailbox: Set-Mailbox -Identity <user's email address> -AllowSendEmail $true
  4. Run the following command to verify that the user's mailbox is now unblocked: Get-Mailbox -Identity <user's email address> | fl AllowSendEmail

Method 3: Using the Exchange Admin Center

  1. Sign in to the Exchange Admin Center with your admin credentials.
  2. Go to the "Recipients" section and click on "Mailboxes".
  3. Find the user you want to unblock and click on their name.
  4. Click on the "Mailbox features" tab.
  5. Under "Mailbox features", click on "More options".
  6. Scroll down to the "Delivery" section and click on "Edit".
  7. Make sure the "Allow users to send email" toggle switch is turned ON.
  8. Click "Save" to save the changes.

After unblocking the user, they should be able to send emails again. If you're still experiencing issues, you may want to check the user's mailbox settings or contact Microsoft Support for further assistance.