I hope I don't have to tell you that you should NEVER download an attachment that claims to come from your bank and that you should NEVER reconfirm your bank details online. These emails are all from scammers who are after you bank details and/or credit card details so they can help themselves to your money.
Dear Customer, We detected irregular activity on your HSBC Internet banking account on 07/06/2011. For your protection, you must verify this activity before you can continue using your account. Please download the document attached to this email to review your account activity. We will review the activity on your account with you and upon verification, we will remove any restrictions placed on your account. If you choose to ignore our request, you leave us no choice but to temporary suspend your account. We ask that you allow at least 72 hours for the case to be investigated and we strongly recommend to verify your account in that time. Best Regards, Colette Nugent Head of Customer Communications © Copyright HSBC Holdings plc 2011 - All rights reservedrved