Hello Lizet,
Good day!
Thank you for reaching out to us about your email sending needs. I understand that you have a business that requires you to send emails to a large number of contacts on a monthly basis, and you're wondering about the maximum number of email addresses you can send an email to at one time.
I apologize for any inconvenience this may have caused, and I'm happy to provide you with more information on this topic.
The maximum number of email addresses you can send an email to at one time depends on your Microsoft 365 subscription. This limit is in place to prevent spam and ensure the security of email accounts.
Recipient Limits in Microsoft 365
The maximum number of recipients you can send an email to depends on the type of subscription you have. Here are the general limits:
Microsoft 365 Business Standard/Business Premium
Maximum recipients per message: 500
Daily recipient limit (total emails sent to all recipients): 10,000
Microsoft 365 Enterprise (E1, E3, E5)
Maximum recipients per message: 1,000
Daily recipient limit: 10,000
Exchange Online Plan 1 & Plan 2
Maximum recipients per message: 1,000
Daily recipient limit: 10,000
Custom Domain with Microsoft 365 (SMTP Relay)
If you use an SMTP relay or a third-party service integrated with your custom domain, the recipient limits might differ depending on how the configuration is set up.
What This Means for You
Given that you have close to 3,000 contacts, sending one email to all of them at once exceeds the maximum recipient limit (500 or 1,000, depending on your plan). To address this:
Divide Your Recipients:
Split your contact list into smaller groups that align with your subscription's recipient-per-message limit (e.g., 500 or 1,000 contacts). Send the email to each group separately.Consider Using a Bulk Email Solution:
If you frequently need to send emails to large lists, I recommend using a service like Microsoft Dynamics 365 Marketing. This platform is designed for bulk email campaigns and allow higher recipient limits while offering advanced features like analytics and email customization.Monitor Daily Limits: Ensure you stay within the daily recipient limit of 10,000 to avoid delays or email delivery issues.
Please understand that our initial response may not always resolve the issue immediately. However, with your help and more detailed information, we can find a solution together.
Thank you very much for your patience and understanding, and thank you for your time and cooperation. Have a nice day!
Thank you for being part of the Microsoft community.
Sincerely,
Microsoft Community Moderator