/// <summary>
/// Validates syntax and existence of the given address.
/// </summary>
/// <param name="address">The address to be validated.</param>
/// <param name="dnsServers">Name Servers to be used for MX records search.</param>
/// <returns>True if the address is valid, otherwise false.</returns>
public static bool Validate(string address, ServerCollection dnsServers)
{
if (!ValidateSyntax(address))
{
return(false);
}
else
{
string domain = address.Split('@')[1];
bool result;
SmtpClient smtp = new SmtpClient();
smtp.SendTimeout = 15;
smtp.ReceiveTimeout = 15;
MxRecordCollection mxRecords = new MxRecordCollection();
try
{
#if !PocketPC
mxRecords = GetMxRecords(domain, dnsServers);
#else
mxRecords = ActiveUp.Net.Mail.Validator.GetMxRecords(domain);
#endif
}
catch
{
new Exception("Can't connect to DNS server.");
}
smtp.Connect(mxRecords.GetPrefered().Exchange);
try
{
smtp.Ehlo(System.Net.Dns.GetHostName());
}
catch
{
smtp.Helo(System.Net.Dns.GetHostName());
}
if (smtp.Verify(address))
{
result = true;
}
else
{
try
{
//smtp.MailFrom("postmaster@"+System.Net.Dns.GetHostName());
//smtp.MailFrom("*****@*****.**");
smtp.MailFrom("postmaster@" + domain);
smtp.RcptTo(address);
result = true;
}
catch
{
result = false;
}
}
smtp.Disconnect();
return(result);
}
}
/// <summary>
/// Validates syntax and existence of the given address.
/// </summary>
/// <param name="address">The address to be validated.</param>
/// <returns>True if the address is valid, otherwise false.</returns>
public static bool Validate(string address)
{
if (!ValidateSyntax(address))
{
return(false);
}
else
{
try
{
string domain = address.Split('@')[1];
bool result;
SmtpClient smtp = new SmtpClient();
smtp.SendTimeout = 0;
smtp.ReceiveTimeout = 0;
MxRecordCollection mxRecords = new MxRecordCollection();
try
{
mxRecords = GetMxRecords(domain);
}
catch
{
new Exception("Can't connect to DNS server.");
}
//Console.WriteLine(mxRecords.GetPrefered().Exchange);
if (mxRecords.Count > 0)
{
smtp.Connect(mxRecords.GetPrefered().Exchange);
}
else
{
return(false);
}
try
{
smtp.Ehlo(System.Net.Dns.GetHostName());
}
catch
{
smtp.Helo(System.Net.Dns.GetHostName());
}
if (smtp.Verify(address))
{
result = true;
}
else
{
try
{
//smtp.MailFrom("postmaster@"+System.Net.Dns.GetHostName());
//smtp.MailFrom("*****@*****.**");
smtp.MailFrom("postmaster@" + domain);
smtp.RcptTo(address);
result = true;
}
catch (Exception ex)
{
#if (DEBUG)
Console.WriteLine(ex.ToString());
#endif
#if !PocketPC
HttpContext.Current.Trace.Write("ActiveMail", ex.ToString());
#endif
result = false;
}
}
smtp.Disconnect();
return(result);
}
catch
{
return(false);
}
}
}
public ValidationResult Validate(string address)
{
if (!ValidateSyntax(address))
{
return(ValidationResult.Error("Incorrect email syntax"));
}
try
{
var address1 = address.Split('@')[1];
using var smtpClient = new SmtpClient { SendTimeout = 0, ReceiveTimeout = 0 };
var recordCollection = new MxRecordCollection();
try
{
recordCollection = Validator.GetMxRecords(address1);
}
catch
{
_logger.LogInformation("Can't connect to DNS server.");
}
if (recordCollection.Count <= 0)
{
return(ValidationResult.Error("Incorrect dns"));
}
smtpClient.Connect(recordCollection.GetPrefered().Exchange);
try
{
smtpClient.Ehlo(Dns.GetHostName());
}
catch
{
smtpClient.Helo(Dns.GetHostName());
}
ValidationResult flag;
if (smtpClient.Verify(address))
{
flag = ValidationResult.Success;
}
else
{
try
{
smtpClient.MailFrom("postmaster@" + address1);
smtpClient.RcptTo(address);
flag = ValidationResult.Success;
}
catch (Exception ex)
{
_logger.LogInformation(ex.ToString());
flag = ValidationResult.Error("Email doest not exist");
}
}
smtpClient.Disconnect();
return(flag);
}
catch
{
return(ValidationResult.Error("Unknown error"));
}
}
