What do I mean by mass mailing with contacts and OpenOffice:
In contacts you select your recipients from the database of contacts and do a mailmerge.
Then you decide which template you want to use for an OO-Mailing (and this is where the OpenOffice document comes in). The template is a general mailing layout in which you can add custom text (which has to be in the same look as the template).
After that you can decide to get one large PDF document for printing or send individual PDFs as an attachment to each of the recipients with the possibility to customize the e-mail message.
