two emails

doublebackup ensures easy archiving of the entire email flow,
both incoming and outgoing, providing you with an archive email address
to be added as bcc in your communications.

It can be easily configured within the most popular hosted email services,
like Exchange Online and Google Apps (Gmail).

It’s already integrated with the “regain email control” products:
SpamStop - spam filter based on mx records
RealSender - smtp servers with dedicated ip only

Tell me more