Hi, I just upgraded to Koha 3.16 using the Debian repo on Thursday. Everything went fine and was working well. On Friday, I found out that a patron received 51 emails of advanced due notices of other patrons. I confirmed this with the server mail logs, but I have no idea why this happened. I verified that this patron's email address only shows up under their record on the borrowers table. Checking the email logs, it seems that it sends a bunch of emails to a single patron, then another bunch to another (I don't know what the content is), so I'm suspecting something strange is going on. I tried running the overdue_notices.pl script with -n -v, and it just spit out a list of messages to be sent, but not the email address it would send it to. Any ideas where to begin searching to investigate this? Thanks, --yuval