I have recently started getting bounce back messages saying undelivered mail return to sender. I have no idea how to stop it. I read on your previous reply to someone to check the header and its a very long list of all sorts of things the top line read this,

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

What do I do to stop this?

Help would be appreciated
Kerry

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