when osticket should send mail for the client , it shows link sends to your mail successfully, but nothing happen is there any configration I should do to be able to send mails?
You need to e.g. setup POP/IMAP to receive/send mails (email tickets)You first need to add a new email address or modify the system email address.Just go there: Admin Panel -> Emails -> Emails OR scp/emails.phpThere you can also specify your SMTP and IMAP/POP settings ;)Additionally some wiki articles you should check out:http://osticket.com/wiki/Email_settingshttp://osticket.com/wiki/POP3/IMAP_Setting_Guidehttp://osticket.com/wiki/Email_Piping
You may want to consider adding a screen shot of the behavior your seeing... as your description and information provided is a little lacking.