[Dovecot] script to extract From: addresses

Hello,

For my manager I need to write a script to extract the From: e-mail addresses from his e-mail account. Then they are sent invitations to join our mailing list(s).

I inherited this Dovecot server, I have not done anything with Dovecot before.

Could you give me some direction on if/how can this be done?

We run Dovecot 1.0.1 (dovecot --version)

Thank you, Iv