A better URL to login into indology mailman options would be:
http://list.indology.info/mailman/options/indology_list.indology.info
If you want to unsubscribe, click "Unsubscribe" in the second block.
For editing other subscription options, you need to login first. Those of us who do not know or do not remember the password for their indology subscription, can use the third block titled "Password Reminder" to remind the password. Once you login into your account with the password you can unsubscribe, or change your delivery options.
One of the subscription options allows you to temporarily disable mail delivery. The options table looks something similar to the following: