Domain blacklist

can the domain get blacklisted if the server tries to send emails to non existing domains?

I keep getting blacklisted even tho i stopped email marketing from my server months ago, when i used to do that tho in my emailing list i had some emails that are not reachable

can this be the cause?

bump

When you say blacklist do you mean spam blacklists? And are you saying you've removed your IP from the spam blacklists yet you keep getting re-added?

If you're emailing the same email content to many non-existent email addresses that are managed by the same host (i.e gmail.com) this could certainly get you on spam lists.

If you're no longer knowingly sending marketing emails from your server, perhaps you have malware that's sending email out? Check your email logs.

Have a look at https://mail-tester.com too, it can give you a free/no-signup report of your email 'health'/spammyness.