I am sending emails through Quick camping weekly, 200k + emails, after starting send me outlook send me email the below message
Delivery has failed to these recipients or groups:
Your message couldn't be delivered because you weren't recognized as a valid sender. The most common reason for this is that your email address is suspected of sending spam and it's no longer allowed to send email. Contact your email admin for assistance.
Any help to send bulk emails without limitation?
Hi,
Seems like many of your recipient marked your email as spam and your email address is blocked. Raise a request with Microsoft support team to check on this from backend.
Thanks,
Soumen
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