[syslog-ng] Escaping open bracket and close bracket.

Hi all, I am trying to escape open and close brackets using a pattern.xml, but it doesn't works. Logfile comes in the following format: 1133422.221|<someuser@domain1.com|<anotheruser@domain2.com>|1.1.1.1|... I have tried different patterns .. The last one is: <pattern>@ESTRING::|@@ESTRING:.from:<>|@@ESTRING:.to:<>|@@ESTRING::|@</pattern> Any ideas??