Our forum website uses bbpress and buddypress, along with a “email subscription” plugin called “BuddyPress Group Email Subscription”. We also use “WP-Mail-SMTP”.
When a person posts a reply to a forum topic, notification emails are sent to all members who are subscribed to that forum. We can track that the emails are indeed being triggered to send through the “WP Mail Logging” plugin, which gives us a full log of emails that are supposed to have been sent.
Problem is: only some of them ever arrive at the destination inboxes. And it seems rather random which ones do and don’t.
Because it’s a forum, there may be dozens of emails triggered by any given reply, so I’m not sure if it’s an overload problem (i.e. too many emails at once) or what. Really need some help understanding how wordpress functions to send these emails. It seems that the emails are being triggered to send, but then only some are actually sent. Really frustrating.
Tried getting answers from Dreamhost (our hosting service) but no luck there yet either.
Any help will be much appreciated!