Is not possible to send emails to users in Moodle 2.8.2+ via SMTP. If I use non-security access (port 25), SSL/TLS (ports 465, 25), evething is without success.

I used right ports, username and password for email connection and email address. Admin of server confirmed my data...

We use this version of PHP: http://afnet.upol.cz/info.php

Maybe there could be a problem with phpmailer?

I am sure SMTP works correctly, admin checked it via postfixadmin and I did the same via Mozilla Thunderbird and used SSL/TLS,... Everything was OK, without errors...

So where is the problem? In my previous version of Moodle 2.5 it works correctly!

Error outputs are:
2015-01-31 09:07:55 Connection: opening to ssl://mail.afnet.upol.cz:465, t=10, opt=array ()
2015-01-31 09:07:55 SMTP ERROR: Failed to connect to server: (0)
2015-01-31 09:07:55 SMTP connect() failed.

Error calling message processor email:
line 118 of /lib/classes/message/manager.php: call to debugging()
line 82 of /lib/classes/message/manager.php: call to core\message\manager::send_message_to_processors()
line 229 of /lib/messagelib.php: call to core\message\manager::send_message()
line 2182 of /message/lib.php: call to message_send()
line 184 of /message/index.php: call to message_post_message()