Get SMTP detail from domain name in c#?

Question

Hi Team Below are my working code- MailMessage mail = new MailMessage(); mail.To.Add(test@domainname.com); string fromEmail = test@yahoo.in; mail.From = new MailAddress(fromEmail); string[] split = fromEmail.Split('@'); string domainName = split[1].ToString(); mail.Subject = Email using any SMTP; string Body = Hi this mail is to test sending mail + using any SMTP in ASP.NET; mail.Body = Body; mail.IsBodyHtml = true; SmtpClient smtp = new SmtpClient(); smtp.Host = smtp.mail.yahoo.com; smtp.Credentials = new System.Net.NetworkCredential(test@yahoo.in *********); smtp.EnableSsl = true; smtp.Send(mail); This code is perfectly working for Yahoo SMTP server. Now what is my requirement here suppose i have hotmailgmail or any other email address i will get it Domain Name into domainName variable. I want to get SMTP mail server name on that Domain Name and pass it to smtp.Host value. In this way i want to keep my code dynamic. Can anyone suggest me the approach for how to get SMTP mail server name on the base of Domain Name? Please suggest.

Praveen Dhatrika · Answer

For evry domain or SMTP Server we use is always associated with its own port number. For gmail we use port number 465(if SSL required)587 (TLS required). For Hotmail it will be same as 587. For Yahoo mail its 995. Similarly tomorrow if you have your own domain then it will be associated with its own port number. Some people use 25 or 43 or 587 as common port number try it once.