I find it surprising when designers complain about submitting their e-mails to get a design freebie. The following temporary e-mail services can be used in order to avoid being spammed…:
There might be many more like the preceding.
Anyway, in case you’re wondering whether your e-mail privacy has been compromised you can use this website to figure it out: https://haveibeenpwned.com/
I do not intend to offend people who have invested into e-mail marketing in order to generate leads… You might lose recipients initially but people many might eventually sign up if they receive great value and become your prospects.