We have a Job Portal and we have a need to send Password reset links for people who request it in our application. We were successful in configuring the SMTP.

We have configured donotreply@udyogii.com as the email for sending these password reset links. 

We are noticing in logs that these emails are not being delivered and give a message 'Unusual sending activity detected. Please try after sometime'

How to go about resolving this. my email id is bharath@udyogii.com. Kindly suggest.