Sending bulk or high volume email presents unique challenges for
businesses, ISPs and email hosting companies. To accommodate bulk
email sending, MMS provides several SMTP options including shared,
semi-dedicated and dedicated hosting services. High volume SMTP
Features: DKIM Signing Sender Policy Framework (SPF) Simple
Integration with your application Your Application, Our SMTP Unlike
typical email marketing services, our high volume SMTP hosting
service lets you send from your own application server, email
client or a combination of different sources. For distributions of
several thousand to greater than 1,000,000 messages per month, our
high volume services are highly scalable and competitively priced.
Becoming a Client In accordance with our Zero Spam Tolerance
Policy, MMS’s bulk email hosting is a tightly regulated service.
Clients are expected to responsibly manage ISP abuse reports and
follow CAN-SPAM guidelines. In addition, MMS researches potential
clients and performs extensive due diligence to prevent abuse.
https://www.massmailservers.net/high-volume-bulk-email-hosting