Some thoughts on email which I hope will be helpful not only as pertains to this club specifically but to emailing generally.
For most members of this club, your email address does not resemble your club username. Thus when you send email to a fellow club member, chances are they aren't going to recognize who it is from. Thus, it is a good idea to include your username in the text of your message.
After checking the name, the next thing most folks look at when sifting through all the spam in the inbox is the subject. If the subject isn't something specifically recognizable and the sender's email address isn't recognizable, chances are the message will be deleted as spam.
Thus that incredibly generous offer you were making on that one of a kind bass you were lusting after in the for sale section will never be read by the seller, who thought it was just another fake Viagra offer.
Thus, since most of you are using email addresses that aren't going to be immediately recognizable by fellow club members, it would probably be a good idea to put the word Alembic somewhere early in the subject line.
Another good idea; in the text of your message, if you are talking about a specific post or thread, provide a link to the thread.