> % telnet gmail-smtp-in.l.google.com 25

Success, it can connect.

> % telnet gmail-smtp-in.l.google.com 587

Fail, the error is:
Trying 209.85.147.114...
telnet: connect to address 209.85.147.114: Connection refused
Trying 209.85.147.27...
telnet: connect to address 209.85.147.27: Connection refused
telnet: Unable to connect to remote host: Connection refused

Thanks