Address Book stuff:

Errors and problems:

It's not clear how or why this happens, but at least it's easy to fix. Somehow, User B ended up with a permissions snafu that made it so User A cannot email them. Right-click or control-click on User B's mailbox and select "Permissions" and see if User A appears with a "Disallowed" permission. E.g.

Delete the users' names altogether and close the window. Things should be okay after that.

Miscellaneous:

You can't. FirstClass empties the trash automatically every night at 3am. You cannot trigger it earlier than that.

When you're in FirstClass and you want to send email to anyone else who's on this FirstClass server, your FirstClass server may be configured such that you must send it to them as "Firstname Lastname", not as "firstname.lastname@domain.org". Under this configuration option, those fully-spelled-out email addresses are only for use by people outside of FirstClass; if you try to use them within FirstClass, the emails will not go through. This is a deliberate security measure (prevents email "spoofing").

Go to Preferences.
Click the General tab.
Next to New mail form, choose Outlook.
Next to Mailbox style, choose Separate Inbox/Outbox.
Log out and log back in.

Your Mailbox will still contain everything - received messages and sent messages. But when you look at your left-side menu, you'll see a separate Inbox and Sent items, meaning you can view them separately.

This seems to be the solution:

- go to the View menu

- select "Change View Properties"

- select the "Lists" tab

- in the "Grouping" section, where it says "Group on:", select "None"

- hit Apply, then OK

Then it shouldn't group the messages by subject.