How to add a first Follow up message
Follow up message is message you send to your subscribers. You can set the day this message will be sent
Avoid using excessive punctuation and CAPS in your messages, especially in the subject line
Always include a plain-text version of your message
Include specifics and a call to action in your subject line
Avoid linking to URLs that contain folders with 1-2 characters (such as domain.com/e/something/ or domain.com/es/) as some filters will consider it as a suspicious item.
Content does play a major role in filtering email. Avoid using spammy sounding words. Use https://returnpath.com/downloads/spam-filters-work/ for more guidelines for successful deliverability. Or use http://emailcopychecker.com/ to check your email for spam words.