I have Classipress + Flatron childtheme installed: merkawind.com
I have also installed the plugin Mail Bank, to ensure a correct email submission. This plugin has an email log (very useful) and the other day I realised that alert emails sent when an ad is going to expire, were sent to many recipients. In particular, they were sent to several users that had ads expiring the same day or close one.
I realised because I had several ads that expired the same day as another ad, and I received in my inbox 5 emails, identical and refered to the same ad (not mine). In the recipient field, there were 4 different emails, some of them repeated several times. I check the users and their ads, and it matched, all of them had ads expiring in the same or close date, and as many ads as times their email address appeared in the recipient field.
Ah, in addition, I didn't receive the alert emails to inform me about my ads expiring, all the alert emails I received were refered to a different ad, not to mines that were expiring as well...
This is super extrange. I checked the email log of the plugin Mail Bank, and yes, the registries were there, repeated and sent to many recipiens.
I will attach some snapshots to show this situation.
I know that to test this, you would ask me to desactivate all the plugins and childtheme, and check if it still happens, but as you may understand, if I do this I won't have a way to check if it keeps happening, as I only could see this with the email log or with the chance that I have another ad expiring in certain date. I just let you know in case you want to check the code, just in case you could spot something easily.