[exim] compress queue before relaying

Hello,

Is there a way to compress the queue on server A before relaying to a remote
exim server B?
The idea is to save on bandwith between A and B, B beeing connected to the
Net and able to dispatch, SMTP trafic between A and B is limited to 256K.
A and B are running exim-4.67.

Regards,
Samer