You have received an email from Loopify that you wanted to preview. It looked fine so you forwarded it to the next person to also take a look at it. Their reaction is "Wow, this email is not feeling well today" because the email looks all messed up: buttons have lost their form, there's some extra blank space, the alignment is not right, or simply put - the whole beautiful design is ruined.
The reason for this is that different email clients render the email differently. The email clients can do adjustments to the email code, like add or remove certain HTML elements. These adjustments then remain part of the email and when forwarded, these changes may not be well received on another email client. And this is what causes rendering issues.
Luckily, forwarding is not the only way to preview your email. In Loopify, you can send an email preview to you, your colleague, or whoever is the person in charge of this. No more forwarding troubles!