Post login scripts environment

Dear Dovecot users,

I am running Dovecot 2.2.27 on Debian Stretch, no issue so far.

I wonder if there is a way to pass the remote IP address, in an environment variable, in the post login script.

My Post login scripts are working well, except that when the server is accessed through a webmail (Roundcube or SOGo), the remote IP address is systematically 127.0.0.1.

The other question I have is, is it possible to pass the user agent of the email client used to access the server? I know this can be easily forged, but I would like to log it.

Thanks for your insight.

-- André Rodier