rate limit reached

Question

Every Month :-

Answer 1

Dear Stripes321

Thanks for your further description. I understand that this is the first email you sent that day, but you selected 56 BCC contacts and encountered server restrictions when sending.

You can successfully send the email after dividing it into three emails, each with about 19 BCC addresses, which means that your email provider allows this relatively small batch sending. This method is in line with normal usage scenarios to a certain extent, that is, avoid sending emails to too many people at one time.

This situation is relatively normal.

Different email service providers (e.g. Gmail, Outlook, etc.) have different sending limit policies. It is normal to have a limit on the number of recipients you can send to at one time, e.g. Microsoft personal e-mail accounts (e.g. @outlook.com@hotmail.com, etc.) have a maximum number of 500 recipients per message, which gets smaller as the account's reputation level decreases. Sending limits in Outlook.com - Microsoft Support

Email service providers set rate limits mainly to prevent spam sending. When you try to send emails to a large number of recipients (such as 56 BCC addresses) at one time, your server may mistake it as spam sending mode. This is because spammers usually send emails to a large number of recipients in a short period of time, and email service providers reduce this risk by limiting the sending rate.

If you often need to send emails to a large number of people, you can try adding contacts to contact groups, but the best way is to confirm the specific usage policy of your email service provider.

I hope this information has been helpful to you. If you have any questions, please let me know and I will be happy to help.

Sincere greetings

Forry.F - MSFT | Microsoft Community Support Specialist

Answer 2

Hi Forry.F

Thanks for your reply. My email address I blanked out most of it as suggested, but it ends in NET.AU sorry the N was partially blanked out. This was the first email I had sent that day, but it had 56 emails addresses which where Bcc'd with no attachments. When this failed because of the error message Rate limit reached, 1st I was thinking it was an email address that was not real, so I broke this news letter email into 3 emails with about 19 Bcc'd emails on each. These were then all sent without a problem. So it was not a restriction on the total emails sent it could be that it did not like 56 in one go. Is this normal?

Answer 3

Hello  Stripes321

Welcome to Microsoft Community.

From the error message you provided, your email address ends with et.au, which is not a Microsoft personal account (such as @outlook.com, @hotmail.com). Do we know if the account is a third-party or Microsoft corporate/school account?

According to the error message "Server response: 450 4.7.1 : Data command rejected: rate limit reached, please try again later", it means that you have reached the sending rate limit set by the email server. This is most likely a security measure of your email service provider to prevent spam.

The policy in the server has little to do with which software you use. It is recommended that you try to send emails on the web page to check whether the same problem exists. For example, in the case of Microsoft personal e-mail, the web page is https://outlook.com ; Google Mail also has its webmail address. Each e-mail provider has a corresponding web page.

Rate limiting is a server policy. Its purpose is to protect the infrastructure and interruptions of Mail Channel and prevent the occurrence of situations, thereby ensuring high email delivery rates for all customers and users in advance. This policy is crucial to protect spam waves that may damage service quality and endanger the good of the Internet community.

It is recommended that you contact the email service provider to find out what their specific sending limits are. They can provide you with details on the number of emails they can send per day, etc.

You can also try to spread out your sending time. For example, send a few now and send the rest later.

I hope this information has been helpful to you. If you have any questions, please let me know and I will be happy to help.

Sincere greetings

Forry.F - MSFT | Microsoft Community Support Specialist