I think that because I tried it and my outgoing emails weren't being delivered. Big mail companies have blacklisted entire C-blocks of IP addresses at VPS prov

I think that because I tried it and my outgoing emails weren't being delivered. Big mail companies have blacklisted entire C-blocks of IP addresses at VPS providers, because parts of those blocks have been used to send spam in the past, and you won't know until you actually check with people you are sending mail to, to ask if they've received them. It sucks.