/// <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 and returns valid addresses.
/// </summary>
/// <param name="addresses">The collection to be filtered.</param>
/// <param name="dnsServers">Name Servers to be used for MX records search.</param>
/// <returns>A collection containing the valid addresses.</returns>
public static AddressCollection Filter(AddressCollection addresses, ServerCollection dnsServers)
{
AddressCollection valids = new AddressCollection();
AddressCollection valids1 = new AddressCollection();
System.Collections.Specialized.HybridDictionary ads = new System.Collections.Specialized.HybridDictionary();
for (int i = 0; i < addresses.Count; i++)
{
if (ValidateSyntax(addresses[i].Email))
{
valids.Add(addresses[i]);
}
}
#if !PocketPC
Array domains = Array.CreateInstance(typeof(string), new int[] { valids.Count }, new int[] { 0 });
Array adds = Array.CreateInstance(typeof(Address), new int[] { valids.Count }, new int[] { 0 });
#else
System.Array domains = System.Array.CreateInstance(typeof(string), new int[] { valids.Count });
System.Array adds = System.Array.CreateInstance(typeof(ActiveUp.Net.Mail.Address), new int[] { valids.Count });
#endif
for (int i = 0; i < valids.Count; i++)
{
domains.SetValue(valids[i].Email.Split('@')[1], i);
adds.SetValue(valids[i], i);
}
Array.Sort(domains, adds, null);
string currentDomain = "";
string address = "";
SmtpClient smtp = new SmtpClient();
bool isConnected = false;
for (int i = 0; i < adds.Length; i++)
{
address = ((Address)adds.GetValue(i)).Email;
if (((string)domains.GetValue(i)) == currentDomain)
{
if (!smtp.Verify(address))
{
try
{
//smtp.MailFrom("postmaster@"+System.Net.Dns.GetHostName());
//smtp.MailFrom("postmaster@"+currentDomain);
smtp.RcptTo(address);
valids1.Add((Address)adds.GetValue(i));
}
catch
{
}
}
else
{
valids1.Add((Address)adds.GetValue(i));
}
}
else
{
currentDomain = (string)domains.GetValue(i);
try
{
if (isConnected == true)
{
isConnected = false;
smtp.Disconnect();
smtp = new SmtpClient();
}
smtp.Connect(GetMxRecords(currentDomain, dnsServers).GetPrefered().Exchange);
isConnected = true;
try
{
smtp.Ehlo(System.Net.Dns.GetHostName());
}
catch
{
smtp.Helo(System.Net.Dns.GetHostName());
}
if (!smtp.Verify(address))
{
try
{
//smtp.MailFrom("postmaster@"+System.Net.Dns.GetHostName());
//smtp.MailFrom("*****@*****.**");
smtp.MailFrom("postmaster@" + currentDomain);
smtp.RcptTo(address);
valids1.Add((Address)adds.GetValue(i));
}
catch
{
}
}
else
{
valids1.Add((Address)adds.GetValue(i));
}
}
catch
{
}
}
}
if (isConnected == true)
{
smtp.Disconnect();
}
return(valids1);
}
/// <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"));
}
}