Thanks for your answer...no..I've not met before...for example I want to tell you "nice to meet you" in my message.do I must tell "I'm pleased that I got to know you"?
is the sentece "Nice to be familiar with you" true?
Thank you very much...
If you're meeting someone in person for the first time, you would say "[It's] nice to meet you."
If you are writing to someone but you have never met them then it wouldn't be appropriate to say anything like that, because you haven't met them and you don't know them!
"To be familiar with someone/something" has a slightly different connotation and you wouldn't use it directly to someone. You could use it to explain that you know someone/something a little, for example:
Q - Do you know Jane, who works in accounts?
A - I'm familiar with her, but I don't really know her.
Q - Do you know the films of Quentin Tarantino?
A - I'm familiar with some of them.