This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
In the last hour, your mailbox has received a large amount of mail from xx email. For the next hour messages to your mailbox from xx email may be rejected by Office 365. The sender of the message will receive a Non-Delivery Report.
Mailbox receiving limits
You can view more details on our mailbox receiving limits here: Exchange Online limits - Service Descriptions | Microsoft Learn
Tips to reduce mail load
High mail load is often caused by automated mailers sending too much mail. If an automated mailer is sending your mailbox many messages you should configure the automated mailer to send the mail over a longer period of time, or configure it to send to multiple mailboxes.
DO NOT REPLY: this is an automated email.
This email is necessary to receive, please help, thanks!
not sure if the tag is right, but please help.thanks!
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(9.6, 31%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJX%3C/text%3E%3C/svg%3E)
Hi @Anonymous ,
Could you now receive emails normally? If your issue has been resolved, you could mark the helpful reply as an answer to close the thread, and this will help people in the community who have the same issue, thank you!
Hi, I'm here to confirm with you if your issue has been resolved. If the problem is successfully solved, you can share your solution and mark them or the helpful reply as answer, this will make answer searching in the forum easier and be beneficial to other community members as well.
This is by design and cant be changed. You will need to wait an hour and stop whatever is sending you messages in that amount
https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits#receiving-limits
Hi Andy,
so after an hour, I can still receive the messages that are blocked because it exceeds the limit?
i just need to wait for an hour, and then all messages will still send to me, right? cause I don't want to lose any important message. thanks!
I still sometimes receive this email.
so after waiting for an hour, I can still receive the messages that are blocked because it exceeds the limit?
i just need to wait for an hour, and then all messages will still send to me, right? cause I don't want to lose any important message. thanks!
During the time the messages are blocked, they will not be delivered but bounced back to the sender. You will not receive them later. the sender would need to resend
@Andy David - MVP I can see the tips to reduce email load, could you please advise how to configure the automated mailer to send the mail over a longer period of time? thanks!
Tips to reduce mail load
High mail load is often caused by automated mailers sending too much mail. If an automated mailer is sending your mailbox many messages you should configure the automated mailer to send the mail over a longer period of time, or configure it to send to multiple mailboxes.
set automatically delete those unnecessary emails sent by automated email helps?
You would have to ask whomever supports that mailer if they can reduce and throttle the load.
Hi @Anonymous ,
During the restricted hour, emails sent to you by other users will not reach your mailbox and they will receive NDR, so you will not miss the message during this period, and you could receive emails normally when the restriction is over.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(240, 98%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EI%3C/text%3E%3C/svg%3E)
Where does Microsoft hold the backlog of messages? Can I delete the backlog?