This forum has only been online for a bit more than a week and it has already been the target of a spammer. Apparently, membership should require more than just leaving your name and (just any) email address.
That is why from now on, account activation is required for new members. Leaving a fake email address means your account will not be activated.
Furthermore, there is no point registering solely for the purpose of promoting your website(s). Save yourself the trouble, your membership will simply be deleted.
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Bieneke