Hello and thank you for your question.
Does your husband ever suspect other's are checking on him or watching him, outside of the workplace? Or is his paranoia only while at work?
What does he think they are saying about him, and what is his proof that they are checking the emails? When you tell him that he seems paranoid, how does he react?
And also, why does he think they would be doing this, meaning what does he say is the motivation for such?
Okay thanks for the additional info. Unfortunately his only proof is also subjective, meaning that it's impossible to verify if they were actually saying that, or if just thought he heard that. Short of talking with them, how could you know. However it does not sound normal that they would be doing this and then talking about it, etc.
It is a symptom of paranoia to think others are spying and out to get you, etc. All that you can do is encourage him to see a psychiatrist about this. It's good that he isn't getting angry with you in reaction, however I can understand why you are concerned.
Tell him that you believe that he believes it, but you are concerned that it could be a symptom of something else going on with him. And if he would just please go and talk to a psychiatrist (even just once for the doctor's opinion) that you would feel much better. If he is willing, then you could accompany him as well to the appointment. Call your local doctor and ask for a referral to a psychiatrist (m.d. level) clinician and make an appointment. I do think this should definitely be checked out... Please click ACCEPT button for this answer. Best wishes... thank you!
Did you have any more questions for me about this? If not, please remember to click ACCEPT button for this question, otherwise I'm not credited or my assistance.