The Courier mailing list manager

List all subscribed users:

couriermlm lsub /var/list/news\@somedomain.net

Count subscriptions:

couriermlm lsub /var/list/news\@somedomain.net| wc -l

Export:

couriermlm exports to a textfile: one address per line, subscription infos, followed by a line which contains a single dot for separation

couriermlm export /var/list/news\@somedomain.net/ > export_subscibers

Import:

couriermlm expects a nasty text file format for import: one address per line, separated by a line containing just a single dot.

couriermlm import /var/list/news\@somedomain.net/ < export_subscibers

Converter script, which reads a textfile containing one address per line, roughly checks the addresses and outputs couriermlm import format:

mlm_import_converter.py.txt

Links:

manual: http://www.courier-mta.org/couriermlm.html