What is a spoof email?

This happens when a spammer alters the header of an email they are about to send out, to thousands or more on their lists..? it shows the FROM email address as coming from your domain..! This is not good and will lead to your good domain been black listed..!

My question is, as we have our websites hosted here at WA, is this situation taken care off, for us by default..? So that all our websites are in safe hands?

If not what can be done to protect us from Spoof Email Spammers?

Are there any settings that we need to enable to save our websites from this happening to our good domains?

Nobody likes to be Black Listed through no fault of their own..!

If we have fallen foul of spammers on our websites is there any way we can find out ? other than seeing our inboxes full of spam emails?

This is how they look...

Christian? Single? Get Connected!

Christian Singles <wordpress@nettalkmatters.com>

From: Christian Singles <noreply-cs2016@qmail.com>

Subject: Christian? Single? Get Connected!

Message Body:

Send

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This e-mail was sent from a contact form on Setting up an Online Business, Not Impossible! (http://nettalkmatters.com)

I have not sent this one out or any others like this one...?

What do I need to do to protect my good website before it's to late..?