Can I get a dedicated IP to avoid server blacklisting?

With shared and reseller hosting, there are other people using your mail server. This means that one spammer can get everyone on that IP address blocked by a blacklist.

A dedicated IP does not help with emails being blacklisted. Email always uses the shared IP, even if you buy a dedicated IP.

The only way to get a dedicated IP for emails is to buy a Dedicated server or VPS plan.