[exim] Help in Mail archiving

Hello Guys,

I have Exim server up and running, we are using it from last 3-4 years,
and Mail flow is on average 40k/week . Now I want to do archiving on my
mail server. I am unable to find any doc for it, please help me with it.

We are using Exim 4.72 , with Dovecot (LMTP) and LDAP server for mail
id users authentication.

I want to do mail archiving because my server is running out of disk and
users mails flow is increasing day by day.


Any help is more than appreciated.

Thanks & Regards,
Anant Saraswat