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Re: General SMTP/MTA Question

----- Original Message ----- From: "Evan Klitzke" <eklitzke lists gmail com>
To: <redhat-list redhat com>
Sent: Saturday, January 13, 2007 8:31 PM
Subject: General SMTP/MTA Question

I am thinking about running an MTA on my home server. At home I am
connected to the Internet through a regular DSL account, so my IP
address is not static, and every few days when I get a new DHCP lease
and the DNS record for my domain has to be updated, which takes about
half an hour. In the meantime, the DNS record for my domain will point
to the old IP address. This isn't really a problem with my HTTP server,
because it is mostly for personal use, so when it isn't reachable it
isn't a big problem. However, I would be concerned about losing email if
an MTA tried to pass mail to me and found that they couldn't reach my IP
address, or that port 25 was blocked on that address.

You can set this up to work without a problem. I believe others have already told you how. However, you may find that your ISP will not allow you to run server on their network. My ISP, Rogers Cable, specifically states that this is not allowed in their End User Agreement and actively scans for servers. If they find one then your receive notice that it must be removed immediately or service will be terminated. I believe this resulted from all the mis-configured servers causing network issues. Also, the dynamic ip blocks of most ISP's are blacklisted. You will likely find that your mail will be rejected by many mail servers. You can thank the spammers for this.

That said, you can still setup your email server for all your local accounts but forward all your email to your ISP's server to send out to the world. Use fetchmail to retrieve all incoming mail from your ISP. This gives you full flexibility to configure your server as your wish but avoids the hassels.

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