> ## Documentation Index
> Fetch the complete documentation index at: https://help.getvero.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How do email previews and live emails differ?

> Key differences between preview emails and live sends, including tracking and links.

Campaign email previews offer an accurate glimpse of what a recipient will receive once the campaign is set live. However, there are a few small differences to keep in mind.

### Unsubscribe

If you're using Vero's automated unsubscribe option in your campaign, if clicked on in a preview, this will not function the same as it would in a live email and will **not** unsubscribe the recipient of the preview if clicked.

### Click tracking on links

In a preview email, Vero does not append **vero\_conv** or **vero\_id** params to links. This means two things:

* Clicked links will not be tracked.
* Upon a 'live' send Vero will append **vero\_conv** or **vero\_id** params to links and therefore differences in url length will be magnified.

### Size

When testing the size of your email campaign compared to a live email campaign, you'll want to take into account that with added vero\_id and vero\_conv params for your links, the more links you have, the larger the HTML weight of the campaign.

*Note: Many email clients begin clipping campaigns more than 102kb of HTML content*