Although the two operate together, they are two separate and distinct items. Subscribing to a List Most list descriptions include the instructions for subscribing to the list. When you first subscribe to a discussion list, you should receive an informational message about sending messages to the list and signing off the list. Temporarily Stopping a List Subscription Suspending Delivery When you are going to be gone for a few days, you may want to suspend mail delivery for the discussion list to prevent your mailbox from overflowing, causing other incoming mail messages to bounce back to the sender. Limit your signature to 4-6 lines.
Limit listserv subscriptions to four.
Use your judgment. If you are subscribing to some very active lists, two lists may be more appropriate. However, if you are subscribing to lists that send out weekly or monthly messages, six lists may be appropriate. Only send messages that pertain to the purpose and subject matter of the list. Chances are, others will be angry too and this will come out in the discussion.