We have a customer who wans to send e-mails following up with customers after service is provided. This could be a 100,000 per mailing at times. They'd rather bring the services in house than use someone like constant contact, and have the money to spend on infrastructure. What kind of mail server can do this without showing up as spam. Do I need multiple IPs, and spread these out over multiple mail servers? Does anyone have experience on this, or can recommend a software/hardware solution? Thanks
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