How to increase the deadline for pop3 connector to remove emails from provider

NethServer Version: 7.9.2009
Module: Pop3 Connector

How to increase the period for which the pop3 connector removes emails from the provider, as it currently has the option for it to remove emails received up to 12 months I would like to increase it to 36 months if possible.

I think it could be something like this:

db getmail show user@domain.tld
db getmail setprop user@domain.tld Delete 13140
signal-event nethserver-mail-getmail-update

But changes on UI will overwrite the manual change.