Hi - Very kind of you all to look at this and also replicate it - as I was starting to think it was just me! The only reason I can think of for this is that I sent quite a lot of emails with the www.discoveringbirmingham.co.uk at the bottom in our signature coming up to our book launch a week or so ago. The hyperlink to our webisite only started this a week ago and it is Virgin email specific.
Thanks for getting back to me, I shouldn't think it would be because of the amount of emails sent because it would just affect your address then, but we can replicate it on our test email account and 用心棒 has also been able to replicate it.
Hopefully we will hear back from the postmaster soon.
No links in my email. As I said in the OP just the one zip attachment (which 用心棒's simple test proved was not the issue) and the body text was something on the usual boring business lines of " documents as requested . Arrange meet later". Nothing unusual at all.
Thanks - I just tested it on an email and http://www.discoveringbirmingham.co.uk/ is now good to use as a link again. Thanks so much for your help. Now we should see a spurt in sales for our new guide to Birmingham!