It was reported that one of the users on the server was not receiving an email from a specific email address.
Further investigation showed that the email was received and delivered to the end user after running a mail delivery report and also combing over the logs manually to which no errors occurred or had been logged.

So I've gone over the log as well as had someone at the data center look over the issue to make sure I wasn't missing something.
And ideas would be extremely helpful, I'm leaning towards user error but think it's premature to point just yet.
Further investigation showed that the email was received and delivered to the end user after running a mail delivery report and also combing over the logs manually to which no errors occurred or had been logged.

So I've gone over the log as well as had someone at the data center look over the issue to make sure I wasn't missing something.
And ideas would be extremely helpful, I'm leaning towards user error but think it's premature to point just yet.