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On Wednesday, September 20, 2017 6:50:54 PM CEST Bas Zoutendijk wrote: |
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> Dear John, |
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> |
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> On Wed 20 Sep 2017 at 07:05:11 -0400, John Covici wrote: |
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> > Restarting sendmail seems fine with me, if you want to have something |
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> > that works everywhere, why not get a domain name from ddns or |
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> > somewhere and use a full fqdn all the time -- you can put your home |
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> > machine on another host in that domain and you will be good to go. |
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> |
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> Thank you for this suggestion. I added ‘.localdomain’ to my host name |
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> and now Sendmail uses this domain name on all networks. Cron mail |
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> arrives again at home. |
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Glad it works now. |
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> I did not want to try a ‘real’ domain name, as this could make the |
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> system accessible from outside the local network, if I understand |
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> correctly. |
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To say it bluntly, you don't :) |
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> Right now it is hidden behind the router and only has a |
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> local IP address. I would like to keep it that way, because then I do |
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> not have to worry about network security settings. Nevertheless you led |
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> me to a solution. |
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This is how it works. |
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To clarify: |
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The IP-address determines how it is accessible. If the IP is not accessible |
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from the rest of the world, then you don't have to worry too much about |
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securing your mailserver. |
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The domain name is only an address-book entry. Unless it is fully entered into |
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the public one, noone will see the IP you are using. And as mentioned above, |
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even if they can, the IP is sitting behind a router and is most likely in a |
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private range. |
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-- |
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