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Comcast makes you downgrade to a business account if you want to get a reverse DNS entry from them. Reverse DNS is a requirement if you want to host your own e-mail and not have your mail categorized as spam. Comcast business accounts don't allow you to use your own DOCSIS modem.

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>Comcast business accounts don't allow you to use your own DOCSIS modem.

Not true. I have multiple business locations using customer owned surfboards.

Might be a requirement for static addresses but it's not for business service in general.

You only need their Comcast Business modem if you have static IP's because they route them using RIP with a password that is set inside the cable modem with their custom software.

If you don't have a static IP with Comcast Business it makes it awfully hard to run a mail server, but then you can indeed use your own cable modem.

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