Catch all for dovecot authentication?

[Tobi]

Hi

I'm aware that there are several good reasons not to do what I want, but
in my use-case it would be an interesting feature. So please no
discussions about the reasonableness

I have some spamtrap SMTP servers (postfix). Currently SMTP AUTH is
disabled. But as I daily have thousands of AUTH tries I thought it would
be nice to be able to accept any AUTH request from postfix in dovecot.

Is something like this possible with dovecot? If so any good description
available on how to achieve?

Thanks

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tobi