[exim] Some feature

Hi!
Our php developers want to use their own mailbox to test php scripts by sending emails to diffents email address by appending some random letters to theirs email address.
Example
Developer have mailbox handsome@???
He setted "mail from" to handsome@??? and send emails to handsome.asdga@??? , handsome.ytjr@??? , handsome.111@??? and all this emails must be stored to handsome@??? .
How to implement this via ACL?