This welcome and information file is sent automatically because your subscription command was successful, because your name has been added to the subscriber list, or because you have sent a message that was not understood and may need assistance. The pens list allows people to send a message to every subscriber by sending only one message. The computer distributes the same message to everyone via internet e-mail. A message comes in, is approved, and goes out to the subscriber list. Subscribers to the list in immediate mode report they like the flow of messages.
Separate messages are easy to file, print, or delete.
This format is a choice you can make when you subscribe via web browser. It distributes the same messages but you receive one bigger message, rather than several separate messages. The packet goes when it reaches a certain size, or no less than twice a day, so the contents are still fresh. That version of the list may help you manage in-box clutter. Really off-topic discussion, banter, etc. should be avoided.