When creating a viral e-mail campaign it is essential to think about different components of this method of digital marketing. Outlined in this blog are the factors I think are most important when creating an e-mail campaign.
Subject Line
The subject line is key as this will normally determine whether a user will open an e-mail or not. It must therefore entice the reader to open it!
via What to consider when creating a viral e-mail campaign | lw258’s blog.