[Hampshire] Is it safe to delete... (Episode 2 of virus saga…

I have now found (by using cat - why did I not think of it before :-()
that /home/peter/.mozilla-thunderbird/30ipc2uz.default/Mail/mailhost.zen.co.uk
contains a file called Inbox which is very long. Can I safely delete it?

Sorry for not just continuing my previous thread about viruses. The email
hasn't arrived in my inbox yet. :-(

TIA
Lisi