Deoes any email is send when i open drupal webpage first time?
You have the SMTP module set up for debug mode, so it prints the protocol exchange details for every email sent. In addition, poormanscron (which is default in Drupal 7) is being triggered by the page request. 

If you turn off the debug option for SMTP those lines will no longer appear. Also you may want to set up an automated cron job so cron runs in the background rather than when users are making requests.