I understand the basics of DNS i just have what i hope to be a quick and painless question.

I have a domain through godaddy. Such as www.mydomain.com. I have my webserver set up. I want to start hosting other companies/peoples webpages for them. I understand that my isp (Comcast) blocks smtp. Obviously i would want my customers to have email at there domain. ex. www.mycustomer1.com

If i get the DynDns(www.dyn.com) service here how do i set it up? Also would i be able to use that for email as well. I have comcast and they will block my smtp ports. Or will i have to buy the email service from Dyn as well?

If i need to get DynDns and DynEmail for email to work than it just makes sense money wise to get comcast buisness class?? Right?

Thanks guys for all the help.

I think you can get the best help from the Dyn.com help pages. http://dyn.com/support/

When I visited their site, I saw that have a video on email, for example.

I used to use No-ip.com when I had Comcast. I wasn't concerned with the email, but, at least then, Comcast was not blocking port 80 (though they did block port 25), so I could self-host my website in that way. The way it worked was that, after registering, I installed a small program on my server and set it to start at boot. It would periodically (every few minutes or so) contact no-ip.com; that kept their record of my IP address up-to-date. Dyn seems to work in much the same way.

You can often get around port 25 blocking by using another port, such as 462 (Comcast improperly blocked me for spamming--when I called support, they told me to just use 462.)

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+1 on dyn.com. I have been a customer of theirs for several years. The service has been 100% reliable and the support has been excellent. I no longer use their dynamic service, but I do use some of their other services, such as my domain registrar.

You would be better off doing this from a VPS or hosted location. Using a consumer line to host websites does violate your ToS with Comcast. Plus you really do not have an SLA for repair/response to trouble issues.

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Here is the comcast agreement for residential service: http://www.comcast.com/Corporate/Cus...Agreement.html

From what I can tell from scanning for the relevant portions, you are free to host a webserver, but not for commercial purposes. Grim76 is correct, your desired application would be better off hosted somewhere else, or perhaps upgrade to a different (business) service. As I mentioned in my previous post, I no longer use Dyn's dynamic service. The reason being is that I now use business grade service which does not have the dynamic IP limitations.

I ultimately stopped self-hosting because my WordPress database became too large for the P4 I was using as a server--it ran, but required frequent maintenance--plus I moved to a location where the cable company was much more hostile than Comcast. Their terms of service say, "no servers."

Self-hosting is first a challenge, then a great learning experience, then a headache (grin). If the terms are service are no danger, I'd say go for it.

thanks for all the help guys. You have opened my eyes a little bit. Hopefully I'm headed down a better path now. The VPS Path maybe? We will see.