This error means conduit had a temporary problem either downloading rules or reporting stats back to Symantec.  It does not affect message throughput.

Do you use a proxy?  (The error seems to indicate the Symantec server is not "talking" ssl, possibly caused by proxy behavior)
How often are the errors? (1 min, 15 min, 1 hour, etc apart)

We dont have proxy. These errors appears in minutes interval (few times per minutes). 

Can you include a a larger sampling of your log. It is possible these are just times when the Symantec web sever went down temporarily for maintenance.

Have you had a chance to verify that you can connect out to the correct location over port 443?  This could be a network related issue, i.e. a firewall blocking the connection to the Symantec Brightmail backend servers.

If you do a test from the command/shell line this may help you can try:

On the server, at the prompt type:

telnet aztec.brightmail.com 443

If you get any error message you can't connect  that means that something is blocking this servers ability to connect over port 443 to aztec.brightmail.com. 

Seeing a blank screen means that a connection was established.

Thanks, this errors disappear...we had problem with exchange. owa etc