Still % problem remian same with addresses

HiWhen i receive reply of my sent messages i see % sign with my email address in CC, bcc especially.

ex.

user%XXXX@XXXX.com

where name of domain occurs two times. (XXXX)

I have checked and configured the messaging >configuration

(conversion tab) outbound option. But still it is the same.

Note: I have not created global domain document. Is it necessary to be created. But there is one option which says either to put % or . - so again there is no benefit of that.

any help is high appreciated