I keep receiving the below message when I try to send emails from one of our accounts. Emails are received but we are not able to send anything out since Saturday May 1, 2021. This is a work email and it's vital that we fix the issue asap.
550 5.4.6 Unusual sending activity
detected. <a href=https://www.zoho.com/mail/help/usage-policy.html
target=_blank>Learn more.</a> Use the link mail.zoho.com/UnblockMe to
unblock