Subject line best practices tend to be all over the map.  We’ve seen studies claiming the shorter subject line is better, and others saying longer subject lines are. And we’ve seen studies saying personalization works and other saying it doesn’t. On subject lines, don’t assume you know the best length. Instead, test, test, test. What’s an email marketer to believe? When it comes to subject lines, the only email marketing best practices you can really depend on […]