[exim] problem with date ;(.

hello exim users!
i have problem with date delivery on one of my accounts.
when im sending email from some local address to that account
Outlock treat that delivery as 2005-01-0x , no as 2005-04-xx.
In source of message i dont see any January or 01 string.
It only happens when mail is going from local server.
All suggestions are welcome, because i dont know where is source of
that weird problem.

Regards
Greg