Remove anyone from the list who is participating for the sole purpose of disrupting normal operation of the list. Stop mail delivery if out of control discussions turn into violent arguments. Fortunately the management has never had to exercise either of those two options. EGroups does not sell, give away, or distribute email addresses. Your email address is much safer on this list than it is on one of the Majordomo format lists.
Email messages become undeliverable for various reasons.
ISP's have temporary interruptions in service, email server names change, domain names change, etc. The server for DX-LIST will attempt to deliver mail to any particular email address for a period of time, and after a number of failed attempts it will 'quit' and place that particular email address on an 'inactive' list. The inactive list for DX-LIST is checked regularly, and any email address found there is noted and reactivated. If you suspect mail delivery problems with your ISP and are not receiving messages from the list, please email me and I will check the inactive list for your address. Any address that appears for the second time on the inactive list is unsubscribed.