We have a user in our organization who sent an email to copied list of over 1000 people (I know!!) a few of the emails were non-existant but that is not the major problem.
Since this email left our systems we have had reports that the email was being delivered to the recipients many times. As many as 50-100 in 2 hours, each an identical copy of the original email, with each of the original recipients getting spammed in this way.
I am at a loss as to what could be causing this. We have checked the users mailfile for any rules set, none found. We have also run an agent to ensure none are suffering from the known issue below,
The server seems to run fine then all of a sudden the mails will start to be generated. For instance, this weekend, everything was fine from friday 5pm until sunday 12.00 am (on the dot) then the emails again started to be generated.
Any suggestions or ideas are much appreciated on this one, as you can imagine we are receiving a lot of flack and also even threats of legal action.