Thanks for the info! I'm a bit new to database management - could you let me know if I'm in the right place? Should I hit "Delete" here? Edit: Or just change "alive" to 0 or null?
2nd edit: I went ahead and changed "alive" to 0, and it worked - I just had to update the "stop sending after" date because it had passed, and it has now resumed sending. Thanks to both of you for your help!