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(80, 19%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAN%3C/text%3E%3C/svg%3E)
All outbound emails from my tenant rejected by remote server with following errror message:
emphasized textRemote Server returned '550 5.7.705 Service unavailable. Access denied, tenant has exceeded threshold. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653 S(7136) [KL1PR0601MB4498.apcprd06.prod.outlook.com]'
Anyone know how to resolve this error?
Thanks and best regards.
![](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(284.8, 17%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYS%3C/text%3E%3C/svg%3E)
Hi @Anh Nguyen Tuan ,
It's been a few days since we have got an update. Please let us know if the provided suggestion is helpful or if you need any further assistance.
Hi @Anh Nguyen Tuan ,
As indicated in this document, the possible cause for error "5.7.705 Access denied, tenant has exceeded threshold" is that the majority of traffic from your tenant has been detected as suspicious and has resulted in a ban on sending ability for the tenant. So, agree with Andy that it's suggested to follow the suggestions provided in the link he shared, investigating the issue using the reports provided and message trace, then try contacting support through your regular channel to help you further.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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.
