workflow:

Metalfort Indiamart Whatsapp to email

Hi @Parth,

The error you are encountering is coming from Zoho Mail’s end. It appears to be related to your account being blocked due to unusual sending activity. We suggest you get in touch with Zoho Mail’s support team to understand why you are facing this issue.
https://help.zoho.com/portal/en/community/topic/unable-to-send-message-reason-550-5-4-6-unusual-sending-activity-detected-please-try-after-sometime