Joomla! My contact form send mail, which i never receive.

My position is, mail can be sent through my contact form ( http://agirsaglam.com/iletisim ) BUT i don’t receive it. I check “sent a copy to yourself”, tried different mail accounts; but the sender accounts also don’t receive the copy of the mail they sent to me.

• joomla have my mail by installation, it is gmail. i believe what we did is to make visitors send mail to my gmail account. because settings are like that http://postimg.org/image/59s0q6nqn/ at joomla. this settings SAYS mail sent, but i cant receive them. when i try this settings : http://postimg.org/image/4rxabt1nn/ i get an error while trying to send mail as “smtp connection failed”.

• should i look somewhere else than my gmail account? but the sender accounts don’t receive their own mail’s copy also.

• I have installed Postfix and configured it, by looking at this tutorial:

https://www.digitalocean.com/community/tutorials/how-to-install-and-setup-postfix-on-ubuntu-12-04

THANKS you guys.