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Editorial Team
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Asked: 2026-05-22T16:18:25+00:00

I am trying to avoid running through DNS servers to get an email message

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I am trying to avoid running through DNS servers to get an email message to an address on one of my hosted virtual accounts.

I know I can surround the IP address with square brackets but how do I designate the mailbox username for the (virtual) hosted account on the server?

In other words,

  • I have multiple domains hosted on a virtual server — all sharing the same IP address
  • obviously, user@domain.com works fine
  • but how do I send to user@[123.456.78.90]

Is what I want to do, possible?

Thanks.

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1 Answer

  1. Editorial Team

    A virtual host needs a domain name in order to figure out what to do. You want to send it to an IP address instead of a domain name. Thus it is not going to work through normal methods. You might be able to specify a “default” domain if none match Otherwise, your only hope is to manually forge email. By this, I mean:

    telnet 123.456.78.9 25
HELO myhostname.mydomain
MAIL From: <myemail@mydomain>
RCPT To: <user@domain.com>
DATA
From: myemail@mydomain
To: user@domain.com
Subject: Testing

This is a test
.
QUIT
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