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On Saturday 25 March 2006 06:50, "Hiren Dave" <hiren2k4@×××××.com> wrote |
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about 'Re: [gentoo-user] Sendmail virtusertable': |
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> Here I have used yahoo.com domain but it can be any domain lets say |
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> domain.com. My network is not connected to Internet. Still do you think |
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> that the following will not work if guru.com exists and domain.com does |
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> not exists physically. |
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|
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Here's how mail delivery normally works: |
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1. Message is composed, and sending is initiatied. |
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2. (Optional) message is handed off to a MTA, this might be local, remote |
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via SMTP, or a separate part of the same application. |
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3. The domain part of each of the destination addresses is queried for an |
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MX record from DNS; if no MX record exists the A record is used instead. |
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4. An SMTP connection is made to the host (MX) or address (A) and the |
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message is delivered there. |
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5. The MDA on that server decides what to do with the message. The may |
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involve forwarding (going back to step 2), local delivery (THIS IS WHERE |
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THE VIRTUAL USER TABLE [or equivalent] IS QUERIED), or other actions. |
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6. Once final delivery is made to a mailbox (or the mailboxes), the |
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recipients use POP, IMAP, Web, mbox, maildir, and/or other methods to read |
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the mail. |
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|
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Does that help? |
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|
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If you are truly isolated from the internet, you can indeed make sure that |
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the DNS MX record for yahoo.com points to your MDA and deliver |
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foo@×××××.com to a local mailbox, but it involves more than just your |
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virtual user table. |
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|
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-- |
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"If there's one thing we've established over the years, |
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it's that the vast majority of our users don't have the slightest |
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clue what's best for them in terms of package stability." |
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-- Gentoo Developer Ciaran McCreesh |
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-- |
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gentoo-user@g.o mailing list |
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