[rutt_fylke]

I use something similar but without the downside of the "+[...]@domain.tld. Some website don't allow email addresses with the "+" and, as mentionned in this thread, the "+..." can be stripped easily.

I use one of my domain name with a catchall address at my email provider. Everytime I have to signup on a website or IRL with an email address, I just use "[e-mail]" or "[e-mail]". I maintain a simple blacklist of all the throw away emails that have been abused over the past 25 years. I have set up a rule on the email server to delete all messages addressed to any of these blacklisted addresses. This is very effective at cutting down spam.

Downside : when you get a real human from a real company on the phone or IRL. Usually, they don't understand why you have "[e-mail]". But it was never a major issue for me.