I find that <servicename> is actually adequate. Your primary adversaries are all automated and the technique is not so widely used to date as to be accounted for by the bots at large. I guess for that extra edge of security you could do it in pig latin.
Re:The Case for Unique Email Addresses
by crossroadsguy on Sunday October 18, 2020 @06:37AM
(#24816839)
Getting the mail isn't the problem. Sometimes I have to reply to those company and especially in a Mail client setup it becomes difficult to reply from <company-name>@mydomain.tld and I often end up replying from <my-first-name>@mydomain.tld and they have my main email as well. Unless of course I setup a "reply-from" for each of these <company-name> emails I used.
> Sometimes I have to reply to those company and especially in a Mail client setup it becomes difficult to reply from <company-name>@mydomain.tld
This was very easy with Unix mail clients twenty years ago — what is wrong with Mail that it doesn't support this functionality?
I could do <servicename>@example.com to make things easier but this is less secure than <random>@example.com