In your profile you have the privacy tab. There you will find this screen
1) You can choose to display your email address and it will be visible to anyone at the left under your username/avatar. We have found that when we get reports of spamming via BYC, that member has the 1st radio button checked. This is the least secure option.
2) You can choose to hide your email, but allow form email. This allows a message to be sent to your email address, and you then have the option to reply to the email and thus allow the person who contacted you to have your email address. Or you can come back to BYC and contact them through the PM system. The form email will have the username of the sender in it.
This option is more secure because you have control over your email yet allows you to have broader contact with other members.
3) You can choose to hide your email and not allow form email. This is the most secure and you are limited to PM contact only.
You do risk missing contact if your inbox is full.
Your message box looks like this (I cropped the screen shot to the relevant part)
Your message limit does count the messages you save in your inbox, sent folder and other folders you have created.
This is the screen for sending a message
If you wish to save your message, you will need to click the "save message" box at the bottom of the screen right above the "send" button.
"Quoting" when you reply is a great way to cut down on message usage. If you are replying to a PM you wish to save, quote it and save it in the sent folder. Then you can delete the message in your inbox.
To use the quote feature in a PM, instead of hitting the reply, just click quote as in this example. Thank you to Nifty for his help!
When you see the message and click on it, you can hit the quote button
Once you do that, this screen will come up
You can enter your message, click "save message" and then send it.
Since you quoted it, you don't need to save it in your inbox.