For dedicated SMTP servers, most people usually go with SMTPmart, Amazon SES, Mailgun, Postmark, or depending on their needs. If you care mostly about inbox delivery and bulk sending, SMTPmart and Mailgun get mentioned a lot because of dedicated IPs, IP warm-up, and reputation management. Amazon SES is very cheap and reliable at scale, but it needs more technical setup. Postmark is excellent for transactional emails and clean deliverability.

The best dedicated SMTP server really depends on your email volume, budget, and how important inbox delivery is for your campaigns. A lot of people go with services like Amazon SES, Mailgun, SendGrid, or SMTPmart because they are easier to set up and can handle bulk sending reliably. From my experience, the most important thing is not just the SMTP provider itself, but also factors like IP reputation, proper email authentication, list quality, and warm up practices. Even a good SMTP server can perform poorly if those things are ignored. I have seen most users mention SMTPmart for affordable bulk email sending and decent deliverability, especially for small to medium businesses, but it is always a good idea to test a provider with your own email list before fully switching.