英语翻译非常感谢您发来的邮件.附件所示业务的合同,我司已于7月20日寄给贵司某某了.根据我司财务规则,我们必须在收到贵司

Thanks indeed for your kind e-mail message. We have sent the attached contract to your esteemed company Mr or Ms on July 20, 2008. But according to our financial rules, we can only pay you after receipt of your signed contract. Kindly hope you could understand our situation. We will arrange the payment for you immediately after receipt of your signed contract.
Thanks for your kind cooperations always.