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Asked: 2026-05-27T12:36:07+00:00

I am trying to send a test email from my IIS it has SMTP

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I am trying to send a test email from my IIS it has SMTP installed, but I am confused how to use IP address to send email.
Here is my code

SmtpClient m = new SmtpClient();
m.Host = "xxx.xxx.xxx.xxx"; // my IP address.
m.Port = 25;
m.Send("xxx.xxx.xxx.xxx", "mymailID@gmail.com", "Test", "This is a test email.....");

This code giving error

The specified string is not in the form required for an e-mail
address.

UPDATE


I am new to email sending concept.

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1 Answer

  1. Editorial Team

    You need the from address:

    m.Send("FROM EMAIL ADDRESS HERE", "mymailID@gmail.com", "Test", "This is a test email.....");

    Documentation Send(string, string, string, string)

    Chances are you’ve received email from robot@domain.com with instructions

    Do Not Reply to this Email

    It seems like this would be your best bet, depending on if your mail server wants an authenticate address or not. For example, http://www.domainY.com, will only send domainY.com email address. There can be a lot of rules or no rules, but that can be for another time.

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