I have changed my method of sending e-mails and I want to run multiple tests of sending 500 e-mails. I don't want to send it to real e-mail addresses as it will just be dummy content. So how could I go about this without risking getting blacklisted or anything? Would I be safe just sending to like or what should I do?
Buy a test domain and add to your server. Create a catch-all email address for that domain name and make all of the email addresses in your test list a variation of that domain.
Used a spare domain/hosting account I had and used a catchall, then just send to random numers @ the domain