It's a more imaginative way of saying "I hope you are well." It is a pleasant way to begin the letter. I disagree with the comment saying that the person writing doesn't really care.
It's the same kind of poetic device you use when you say something like
"I hope this day brings you happiness."
Days don't actually bring anything. Things happen during a day, but the day doesn't bring them. Similarly, emails don't actually "find" anything.