cannot send e-mail to most recepients

If you are unable to send emails to most recipients using Outlook Live, there are several potential issues to consider:

1. Blocked Recipients: Check if the recipients' email addresses are blocked or if they are on a global block list. If your email is being flagged as spam, it may not reach the intended recipients.
2. Email Delivery Issues: There may be issues with email delivery settings or configurations. Ensure that your email account is properly set up and that there are no restrictions on sending emails to external addresses.
3. SMTP Authentication: If you are using a POP3 or IMAP account, ensure that your account is configured to authenticate with the SMTP server. This is often required by ISPs to send emails. You may need to enable the option to log on to the incoming server before sending mail.
4. Connectivity Issues: Use tools like the Microsoft Support and Recovery Assistant to check for connectivity issues that may be affecting your ability to send emails.
5. Antispam Measures: Sometimes, outgoing emails may be blocked by antispam measures if your IP address has been flagged. You can check if your IP is on a blocklist using third-party services.

If these steps do not resolve the issue, consider reaching out to Microsoft support for further assistance.

References:

• Help Identify My Issue with Sending/Receiving Email in Outlook (Automatic Checks)
• Find and fix email delivery issues as a Microsoft 365 for business admin

Hi Earl,

It's understandable why you’re seeing emails only reach some addresses. This is often because of sending limits, server blocks, or spam filters.

• Check for and read any bounce-back messages you get.
• Try sending a simple, text-only email without attachments.
• Make sure the recipient's addresses are correct and not blocked in Outlook.

Have you sent many emails lately or changed settings? These can cause temporary limits. Tell me about any error codes or if this happens with particular domains like Gmail or Yahoo.