Receiving emails problem

[Gintare Ragaisiene]

Hello,

I have DirectAdmin system installed with CentOS OS. I created a user and a
user email account. Then I tried to send email from my website (which is
written on PHP5) to my mailbox. Everything seemed ok, but I did not
received letter on the mailbox.
The same is wehen I am trying to send through webmail SquirrelMail.

I got a record on var/log/mailog:
Mar  5 17:07:15 432282 dovecot[535]: imap-login: Login: user=<gintare>,
method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=7134, secured,
session=<Rdpd7IsQhgB/AAAB>
Mar  5 17:07:15 432282 dovecot[535]: imap(gintare): Disconnected: Logged
out in=79 out=766

Please, help me.

Versions:
DirectAdmin - 1.4
CentOS - 6.6
Dovecot - 2.2.15
SquirrelMail (wbmail) - 1.4.23

Thanks,
Gintare