DW extension advice

Simple PHP email obfuscation example:

<?php
//Encode Email
function protectMail($s) {
$result = '';
$s = '' . $s;
for ($i = 0; $i < strlen($s); $i++) {
$result .= '&#' . ord(substr($s, $i, 1)) .
';';
}
return $result;
}
?>

usage:

<a href="mailto:<?php echo protectMail('you@yourwebsitedomain.com'); ?>">Click here to email us</a>

 If email links are a must, I would create a new, unique, unused email address for the website, at least that way you can get an idea of how effective any kind of email obfuscation is against email harvesters.

A backend CMS is necessary for non-coding amateurs to manage the site with.  Even WordPress with a Memberhsip Plugin would be a better option.

https://www.wpbeginner.com/wp-tutorials/ultimate-guide-to-creating-a-wordpress-membership-site/

I agree with Nancy that posting email addresses is a bad idea.  I'm wondering why you are so set on creating this in Dreamweaver thinking it will be easy to hand over.  If someone doesn't know how to code, making them purchase HTML editing software or trying to edit code in a free text editor is very dangerous.

Personally I would recommend looking into software to manage your community and make it easier to maintain without an editor like DW such as Invision Community ( https://invisioncommunity.com ) or Vanilla ( https://vanillaforums.com/en/ ).  There are probably others out there, but I think you would be better with a solution like those as opposed to trying to build this all yourself and thinking it will be easy to hand off. Having something with a modern web interface to manage online from anywhere would be your best bet to hand off to a client or someone potentially without technical expertise.

Never post e-mail addresses, obfuscated or not, on the open web.  I highly recommend you build your app behind password protection so nobody can see sensitive data except your members.

Secure form processing and encryption are essential to protect your site, your members' data and your server from exploitation by hackers and spam bots.  Ask your hosting provider which form processing scripts they recommend you use with your hosting plan.    Or you can go 3rd party and use a form service like JotForms or Wufoo.com where form data is collected and processed on their servers, not yours. 

1. One way is to use CSS to obfuscate the email link. As an example, I use right2left as follows:

The CSS:

.reverse { 
    unicode-bidi: bidi-override;
    direction: rtl;
}

the HTML:

<p class="reverse">moc.elpmaxe@liam</p>

the Result:

mail@xample.com

2. Have a look at

i) https://www.webassist.com/

ii) https://www.dmxzone.com/3/extensions