I am trying to email a Credit Card Dispute from of customerservices.card@hdfcbank.com. I got this mail id from the customer care. There was a wrong transaction done from my card and I am trying to revert that. For this I will have to file a dispute here. For which I had downloaded a pdf from from the official site and then took a printout. I filled it wrote the full detail separately. I scanned those documents and then tried to attach them in my email. I am using Yahoo mail. But each time when I send the mail I am getting this delivery fail notice. How to send this mail properly.
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