/// <summary>
/// Return a list of MX records
/// </summary>
/// <param name="emailList">List of eamils to check MX records from</param>
/// <returns></returns>
static public Dictionary <string, List <string> > GetMxRecords(ref List <Email> emailList)
{
var OutputList = new Dictionary <string, List <string> >();
var ExcludedDomainsList = new List <IgnoredEmails>();
var list = CsvParser.LoadDomain("Domains - Customers");
if (list != null)
{
ExcludedDomainsList.AddRange(list);
}
list = CsvParser.LoadDomain("Domains - Common");
if (list != null)
{
ExcludedDomainsList.AddRange(list);
}
list = CsvParser.LoadDomain("Domains - AV Blacklist");
if (list != null)
{
ExcludedDomainsList.AddRange(list);
}
list = CsvParser.LoadDomain("Domains - Supplier list");
if (list != null)
{
ExcludedDomainsList.AddRange(list);
}
var domainList = new List <string>();
foreach (var email in emailList)
{
domainList.Add(ReturnDomain(email.EmailAddress));
}
domainList = domainList.Distinct().ToList();
//Remove domains that are in the excluded list
var tempDomainList = domainList;
var removedDomainsList = new List <string>();
if (ExcludedDomainsList != null)
{
foreach (var excludedDomain in ExcludedDomainsList)
{
foreach (var domain in domainList.ToList().Where(domain => excludedDomain.Name == domain))
{
tempDomainList.Remove(domain);
removedDomainsList.Add(domain);
}
}
}
Console.WriteLine($"Removed {domainList.Count - tempDomainList.Count} domains");
domainList = tempDomainList;
var tempEmailList = emailList;
foreach (var email in emailList.ToList())
{
foreach (var removedDomain in removedDomainsList)
{
if (ReturnDomain(email.EmailAddress) == removedDomain)
{
tempEmailList.Remove(email);
}
}
}
Console.WriteLine($"Removed {emailList.Count - tempEmailList.Count} emails");
emailList = tempEmailList;
foreach (var record in domainList)
{
try
{
//string rec = ReturnDomain(record);
Func <List <string> > getMxRecords = new Func <List <string> >(() => GetMxRecord(record));
OutputList.Add(record, RunTaskWithTimeout(getMxRecords, 10) ?? new List <string>()
{
"No records"
});
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
return(OutputList);
}
static void Main(string[] args)
{
//CheckDns();
try
{
Data = new JsonParser().Load;
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
Dictionary <string, List <string> > mxRecords = new Dictionary <string, List <string> >();
//Add existing output to output list to save old records
List <EmailOutput> checkedEmails = new List <EmailOutput>();
var list = CsvParser.LoadEmailOutput("Checked Emails");
if (list != null)
{
checkedEmails = list;
}
Console.WriteLine($"\nLoaded {checkedEmails.Count} existing records");
//Load all emails that need to be checked
List <Email> emailsToCheck = new List <Email>();
var tempEmailList = CsvParser.LoadEmail("Email list");
if (tempEmailList == null)
{
Console.WriteLine("Cannot find 'Email list.csv'\nPlease add it to the CSV folder");
Console.ReadKey();
}
else
{
emailsToCheck.AddRange(tempEmailList);
}
var tempList = new List <Email>();
foreach (var email in emailsToCheck)
{
if (email.EmailAddress != "" && email.DomainName == "" && email.FirstName == "" && email.LastName == "")
{
tempList.Add(new Email(email.EmailAddress));
}
else
{
tempList.Add(email);
}
}
emailsToCheck = tempList;
List <IgnoredEmails> ignorePrefix = new List <IgnoredEmails>();
try
{
ignorePrefix.AddRange(CsvParser.LoadDomain("Prefix - Common.csv"));
if (ignorePrefix.Count > 0)
{
tempList = emailsToCheck;
foreach (var email in emailsToCheck.ToList())
{
foreach (var prefix in ignorePrefix)
{
if (returnName(email.EmailAddress) == prefix.Name)
{
tempList.Remove(email);
}
}
}
emailsToCheck = tempList;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
//Remove emails that already have been checked
try
{
var tempCheckList = checkedEmails;
foreach (var existingEmail in tempCheckList)
{
foreach (var email in emailsToCheck)
{
if (Compare(existingEmail, email))
{
Console.WriteLine($"Removed {email.EmailAddress} : x{checkedEmails.RemoveAll(x => x.EmailAddress == email.EmailAddress)}");
}
}
}
checkedEmails.Distinct().ToList();
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
mxRecords = GetMxRecords(ref emailsToCheck);
foreach (var record in mxRecords)
{
Console.WriteLine(record.Key);
foreach (var mxRecord in record.Value)
{
if (mxRecord.Contains("no record"))
{
mxRecords[record.Key].Remove(mxRecord);
}
else
{
Console.WriteLine(mxRecord);
}
}
}
var newlyAddedCounter = 0;
mxRecords = getTcpInfo(mxRecords);
//Check emails against domain to see if they match, then run telnet
//Console.WriteLine($"\nChecking 0/{emailsToCheck.Count}");
foreach (var email in emailsToCheck)
{
Console.WriteLine($"Checking {emailsToCheck.IndexOf(email) + 1}/{emailsToCheck.Count}\nEmail: {email.EmailAddress}");
try
{
foreach (var tcpRecord in mxRecords[email.DomainName])
{
Func <bool> telnetCheck = new Func <bool>(() => IsEmailAccountValid(new TCPClient(tcpRecord, email.EmailAddress)));
if (RunTaskWithTimeout(telnetCheck, 10))
{
checkedEmails.Add(new EmailOutput(email));
newlyAddedCounter++;
Thread.Sleep(20);
break;
}
}
}
catch (Exception ex)
{
Console.WriteLine($"Skipped domain {email.DomainName}\nNot in domain list");
Debug.WriteLine(ex.Message);
}
}
Console.WriteLine($"\nDomains for emails found {checkedEmails.Count}/{emailsToCheck.Count}\nMissing: {emailsToCheck.Count - newlyAddedCounter}");
checkedEmails = checkedEmails.Distinct().ToList();
checkedEmails.SaveToCsv("Live emails");
Console.WriteLine($"\nSaved {checkedEmails.Count} records");
Console.WriteLine("Program ended\nRead key");
Data = new Data(mxRecords, checkedEmails, emailsToCheck, ignorePrefix);
new JsonParser().Save(Data);
Console.ReadKey(true);
}