合作伙伴英文-合作伙伴英文partner

我从今天起接替同事的工作，需要给合作伙伴发英文邮件say hello，这种邮件的主题怎么写呢？英文的哈？

对应的英语：Dear xxx,My name is xxx. I will succeed Mr xxx's job from today. I'd like to say hello to you at moment and hope we will have a good incorporation in the future. Best regards,xxx.