Got it - the links in that contacts option are to send by e-mail which
will ask which service you'd like to use. Yandex is a Russian Web Mail
client and when I set the page to use that I too get that pop-up which
is asking me to log into a Yandex account. Now that I've done this,
every 'Mailto link in Opera will try to use Yandex !! To clear, I go
into preferences and reset the Mailto option - simples tavarich