The source project of this merge request has been removed.
Due to the smtps transport specifying a header_check, the received_anon
replacement wasn't being done. (#7890)
This moves that replacement into its own class, clears the old value and sets it properly in the smtps transport.
This has been tested on cricket.
Change-Id: I27c02730597df4943761d8bcb61014aeded9dc75