STMP

[pcangel]

Hi guys.
I have very strange problem. I use the Thunderbird mail client. Use SSL connection with port 587 supposedly everything is fine when I decide to send mail and after 1-2 minutes of trying to send my mail server returns an error STMP blablabla.com expired

Jul 29 11:05:57 phoenix postfix/smtpd[25777]: lost connection after UNKNOWN from unknown[90.154.240.190]
Jul 29 11:05:57 phoenix postfix/smtpd[25777]: disconnect from unknown[90.154.240.190]