Hi Wei Ming Leong I want to help you with this question.
Yes, it is possible to sent bulk emails to many individual recipients. The limit with Exchange Online is 1000.
You can read all the limits also here: https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits#sending-limits-1
Please consider the rate limits in the sending process, you should sent the emails in scmaller chunks and waves.
I hope I could answer your question.
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