Smtp server not returning error
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I have problem with checking existing of gmail account. For connecting to smtp server i use openssl for Windows. After run i writing next line to connect to server:

    s_client -starttls smtp -crlf -connect smtp.gmail.com:587

After connect, i login on server using auth login.
After this i starting to create new mail:

    C:mail from:<somegmail@gmail.com>
    S:250 2.1.0 OK w7sm27345781wiz.0
    C:rcpt to:<incorrectEmail@asas.com>  //input incorrect email
    S:250 2.1.0 OK w7sm27345781wiz.0
But after input incorrect email server must return error:

    550-5.1.1 The email account that you tried to reach does not exist...

Why server not return error?