There are conflicting notes about people with fsmail.net addresses.
One one forum, WebUser (magazine) there's someone saying that fsmail was a webmail-only service.
However, on OrangeProblems.co.uk there are people saying it doesn't work at the moment.
Elsewhere, on WonBlog.co.uk someone comments that there has been "long enough for people to migrate to Orangehome.co.uk mail addresses" as if there was some notification that Freeserve mail addresses were being withdrawn.
I know it is a pain to change, and you probably don't want to go the whole hog and get something like misshardbroom.info so you can mail sent to you as [email protected] (OK, some other domain, something more creative, but you get the idea) as that'd be extra hassle and so on.
Only reason I mention 'pain to change' is that if the mail service is flaky, and might someday be withdrawn, then better to start teaching everyone you have a new mail address and the sooner the better.
I had an e-mail address and webspace with an ISP in the USA for 8 years, but in the end they were bought up by a big cable service from another State and my ultranet.com mail address died a month or two later.
I would always advise clients to not tie their e-mail to their ISP, so they can change ISP any time they want without having repeated and endless hassle over losing contact with people.
For a business, having their own domain is easy. For an individual or family, easy to use a free account like Google Mail (and advantage is that with a 10 GB mailbox, it won't get filled overnight if someone sends you a load of photos from their holiday / wedding /etc).
One morning I had over 40,000 e-mail messages in my Freeserve mailbox, taking it to 4 times their normal maximum, so I had to delete them before they suspended my FS mail account...
Switched to Runbox a while ago (they charge a fee, but also have a 10 GB limit, and allow me to pull in e-mail from other mail accounts).
Also worth looking at SpamGourmet.com sometime as you could use a different mail address for each website you use, and never give them your actual e-mail account (blocks spam).