for the last couple of times, a newsletter I’m sending out to about 4000 adresses is showing about 10x the amount of list subscribers in the “processed” field after finishing the campaign.
None of the test addresses I use to determine if something is wrong has been sent the newsletter even twice. However, the system protocal shows a massive amount of error entries about “failure to instantiating the mail function”.
As the queue finishes at some point, I assume all messages are being sent eventually.
What could be the reason for this. Any tips what I should consider when contacting the hosting provider about this?
Thanks a lot!