The "Rules" function in MailDroid allows you to customize notifications for your various accounts. Let's look at an example:

- Rule 1 (Night): At night, no matter where I am, I would like MailDroid to be silent and just flash the LED when I receive e-mails (for all of my accounts)
- Rule 2 (Date): Whenever I am on a date, I would like MailDroid to vibrate when I receive new e-mails
- Rule 3 (Work): At any time, and regardless of where I am, I would like MailDroid to ring, vibrate, and flash the color red when I receive e-mails in my work account.

Next you can prioritize these rules and order them according to what is most important to you, for example:

- Rule 1 (Night)
- Rule 3 (Work)
- Rule 2 (Date)

In this scenario, I have ordered the rules in a way such that I do not want MailDroid to make any noise at night, regardless of the account in which I receive e-mails ("Night" rule first). When I am on a date ("Date" rule) I only want MailDroid to ring when I receive an e-mail in my work account ("Work" rule). Rationale: it's better to break the date rule than miss an e-mail from my boss! Of course we all have different priorities, and so rules will vary. I could have also set up my rules:

- Rule 3 (Work)
- Rule 1 (Night)
- Rule 2 (Date)

or

- Rule 1 (Night)
- Rule 2 (Date)
- Rule 3 (Work)

To summarize, when you receive an email, MailDroid will decide what to do based on the rules that you have defined. The "Rules" feature in MailDroid so far contains:

1. Time and Day
2. Accounts (list of accounts that you have setup in MailDroid)
3. Notifications: vibrate - on/off, led - on/off, ringtone - on/off, icon - on/off
4. Notification Sound: Choose what ringtone you would like to use
5. LED Color: Choose what led Color you would like to use

In the future, more options may be added to this feature.