Each mailing list has its own rules. Be sure to read them thoroughly before you subscribe. You can subscribe to have messages delivered individually to your e-mail box or by digest where they are grouped together. If the mailing list is very active, consider joining in the digest format. Before subscribing to a list you can search or browse the archives. Information you need may already be in the archives. Be sure your posts pertain to the county and not some other state or county.
Check out the Nebraska Mailing Lists by county and also topics, such as cemeteries, Czechs, census look-ups and more. It's fun and eventually you may have a good deal of information in your e-mail box.