Macdonald said:
Hello again richc46. My antivirus software is MS Security Essentials. However I cannot see an antivirus programme scanning and /or deleting my sent emails.

t-4-2. I will do as you suggest and see how I go. The problem is that this is does not occur everytime I close and then open WLM.
I think perhaps that if this does not solve the problem I will just have to live with it. I could try uninstalling and then reinstalling WLM.

Thanks again for your help.
You don't have to " live with it ", unless there are requirements that only WLM can provide.
There are other free e-mail programs to choose from :
Top 11 Free Email Programs for Windows - About Email