Pre-flight check under Review & Send:
Pre-flight check allows you to double-check your reply-to information, see your contact count, and the list of the lists/groups/searches you are sending your email to.
Marketing Tip: Do not use an @yahoo.com or @aol.com email address in your reply-to email address. Yahoo and AOL made policy changes earlier in 2014 that made all email providers who service clients with @yahoo.com or @aol.com reply-to email addresses experience high bounce back rates. Instead of using a @yahoo.com or @aol.com email address, we recommend using an email address from a paid for domain (i.e. firstname.lastname@example.org).