All Zoho Mail accounts blocked, error code 554 5.1.8

Dear Zoho Mail Support,

I am writing to you today because all of my Zoho Mail accounts have been blocked and I am unable to send emails. I have been using these accounts for 1 years and have never had any problems with them before.

I tried to send an email today but I was unable to do so. I received an error message error code 554 5.1.8. I am not sure what this suspicious activity is, but I can assure you that I have not done anything wrong.

I have 30+ email IDs in my organization and we are using around 45 email IDs. All of these email IDs are facing the same issue.

I would appreciate it if you could help me to unblock my accounts as soon as possible. I need to be able to use these accounts for work and personal reasons.

I have attached screenshots of the error messages that I am receiving.

Thank you for your time and attention to this matter.

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