If you are looking for dedicated smtp server provider please make sure the company has nice history. Make sure you are not buying vps mail server because vps cant handle big volume bulk mails. The dedicated smtp server provider has ability to handle spam complains. The smtp company has 24/7 support and their response time is good. You can buy additional IPs if your current IPs become blacklisted. The server hardware is strong to handle big mail que etc…
Some good and cheap smtp server providers are.
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