In mail preferences, under the accounts section, each account will have a "Include when automatically checking for new messages" preference as follows:

However, it doesn't seem to work. Mail won't check messages initially, but once I hit the check for new messages button, all subsequent timed checks (those that are automatic) include the disabled account.
Is this a bug, or am I missing something else?

However, it doesn't seem to work. Mail won't check messages initially, but once I hit the check for new messages button, all subsequent timed checks (those that are automatic) include the disabled account.
Is this a bug, or am I missing something else?