My server IP is blocked

Hello,

Some weeks ago we had a situation with spam sending from our server with IP 193.137.66.234

The server was properly cleaned and we have restored our IP reputation, 

Also we are currently not blacklisted in http://ipremoval.sms.symantec.com/lookup/ 

But we still receiving the following error message when sending to Symantec protected email servers.

LOG: MAIN

(connect to cluster8.us.messagelabs.com[216.82.241.132]:25: Connection timed out)