I usually recommend against using anchor links in email newsletters; the reason for this is twofold.
First, when someone is viewing a newsletter their attention span is probably extremely short. They probably want to get onto their next email, but something has triggered their interest in your newsletter. Why waste that interest on jumping them further down the email, this is your chance to grab their attention and hook them into your website. It may be your last chance before they click onto their next email and your website is probably a much richer web experience anyway.
The second reason is anchor links are just another thing that often goes wrong in email newsletters. They act unpredictable, and at the time of this writing, don’t even work properly in Gmail. I also remember a time when an anchor link would show a blank screen in Yahoo! Mail, although this has since been fixed.
Despite these reasons, using an anchor links in an email is usually not my decision to make, so I have to try and find a way to make it work. A regular anchor link like the one below will not work in Gmail.
<a href="#section1">Section One</a>
However this will work.
<a href="#section1"><span>Section One</span></a>
Like many email newsletter hacks and tricks it’s a simple one, but can be frustrating and time consuming when trouble shooting it for the first time.