@Tanvir Hossain Khan Your accounts seem to be running into errors which is why your campaign are running into an error. Also, the similar reason why you are not able to send test emails.
It seems the SMTP is disabled.
Please follow these steps:
Enable SMTP and then wait for an hour. Waiting for an hour is a crucial step. This allows Microsoft to propagate the changes and share new token with us.
Remove accounts from Instantly and then connect them again.
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Srishti
@Tanvir Hossain Khan Your accounts seem to be running into errors which is why your campaign are running into an error. Also, the similar reason why you are not able to send test emails.
It seems the SMTP is disabled.
Please follow these steps:
Enable SMTP and then wait for an hour. Waiting for an hour is a crucial step. This allows Microsoft to propagate the changes and share new token with us.
Remove accounts from Instantly and then connect them again.