I do not have a specific answer for you but I can give a generalized one. Avoid at all costs the domains that historically had the least costs. Spammers pick

I do not have a specific answer for you but I can give a generalized one. Avoid at all costs the domains that historically had the least costs. Spammers pick up the cheap/free domains and their TLD's gain a very bad reputation. Spamhaus [1] has a list of the most abused top level domains. Avoid those at very least. [1] - https://www.spamhaus.org/statistics/tlds/ https://www.spamhaus.org/statistics/tlds/