I have a drip campaign in a mailing list, set to send emails +28 days and +56 days after signup. All subscribers have a join_date in the database, and all emails are sending out as expected.
I added a new email for +84 days about a week before anyone is 84 days old, but that email is not sending correctly.
Checking the database, 29,514 emails are subscribed and joined more than 84 days ago - my own email address included. I received the email, but my colleague did not. Our row in the subscribers database is identical in all fields (apart from email address, obviously). Only two other people in the database out of those 29,514 received the new drip email. I cannot figure out why this is.
Any ideas? Running version 1.1.5.4 in a dedicated server Unix/centos environment.