Our e-mail server features catchall addresses to the domain finster-consult-invest.de which means, you may write anything before the @ to send me e-mail.

I prefer contextual aliases, ideally with some sort of date in front. For example: 19700101-business-contact@finster-consult-invest.de

You may just copy and adapt that address. In case it receives spam, it will be blacklisted.