function for whitelisting IPs

[Gerald Galster]

> Do you have any examples of such a function and how/where it is used ?

>    I have a better idea:
>    Have a function for whitelisting IPs, possible /24's or similiar, where a login to roundcube or other webmail client (with 2FA) will add the IP onto a whitelist for that account.

For some it might be sufficient to just return the allow_nets field:

https://doc.dovecot.org/configuration_manual/authentication/allow_nets/

Best regards
Gerald