Get SMTP name by passing domain name in c#?

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Hi Team,
I have very basic question, i have a domain name for example yahoo.in with me. Now, i want to pass that domain name and get SMTP mail server name for example smtp.mail.yahoo.com. I want to get this by c# code.
Means, i want dynamic SMTP name fetch by passing domain name.
My intention behind this, i have multiple of email addresses so i will pass domain name for a requested email address and fetch SMTP mail server name.
Please suggest code to get SMTP name by domain name.
Thanks in advance.

Posted 8-Nov-15 19:01pm

Member 8090436

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PANKAJMAURYA · Answer 1 · 2015-11-08T19:28:00

You can use ARSoft.Tools.Net library to get the available SMTP servers for domain.
It's available on NuGet Packages:

C#

PM> Install-Package ARSoft.Tools.Net

Import the namespace:

C#

using ARSoft.Tools.Net.Dns;

Then make a synchronous lookup as:

C#

var response = DnsClient.Default.Resolve("yourdomain.com", RecordType.Mx);
var records = response.AnswerRecords.OfType<mxrecord>();
foreach (var record in records) {
    Console.WriteLine(record.ExchangeDomainName);
}
</mxrecord>

Which will give output like :

C#

mail1.yourdomain.com
mail2.yourdomain.com
mail3.yourdomain.com
mail4.yourdomain.com

Full documentation is available Here[^]