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Pop3 Authentication Using Proxy

i keep getting authentication failed error after i provide proxy information to Pop3Client. Connection is fine but authentication part gives the following error:
ProxySettings ProxySetting = new ProxySettings
{
Name = "asaf",
Host = "192.168.3.55",
Port = 808,
Auth = new Authorization
{
Type = AuthenticationMethodConstants.Ntlm,
User = "User-001",
Password = "Deneme123"
}
};
using (var client = new Pop3Client())
{
client.Timeout = 120000;
if (ProxySetting != null)
{
client.ProxyClient = ProxySetting.CreateHttpProxyClient();
Console.WriteLine("Current proxy: " + client.ProxyClient.ProxyHost + ":" + client.ProxyClient.ProxyPort);
}
client.ServerCertificateValidationCallback = (s, c, h, e) => true;
client.Connect("outlook.office365.com", 995, SecureSocketOptions.SslOnConnect);
client.Authenticate("mcs234#lenfs.onmicrosoft.com", "phtfg456!");
Interesting thing is that I just tried the same code with ImapClient with port 993 and it worked just fine. It seems problem is only for Pop3 protocol.

EWS can't get all unreaded mail which is got error while reading

I have windows service that working every 10 second. It's working fine generally but sometimes im getting these errors;
at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest1.Execute()
at OutlookService.ItemLoad(EmailMessage message, List1& attachmentList) in \OutlookService.cs:line 69; The request failed. Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
25.09.2019 15:03:53: Microsoft.Exchange.WebServices:at Microsoft.Exchange.WebServices.Data.SimpleServiceRequestBase.ReadResponse(IEwsHttpWebResponse response)
My problem is if that mail got error while reading it cannot be read again. Its stay unread mail but i cannot get it.
My Code;
private static ExchangeService Service2013
{
get
{
if (_service2013 == null)
{
var uname = "mail";
var pwd = "pass";
_service2013 = new ExchangeService(ExchangeVersion.Exchange2013_SP1);
_service2013.Credentials = new WebCredentials(uname, pwd);
_service2013.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");
}
return _service2013;
}
}
ExchangeService service = OutlookService.Service;
SearchFilter sf = new SearchFilter.SearchFilterCollection(LogicalOperator.And, new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, false));
try
{
FindItemsResults<Item> findResults;
ItemView view = new ItemView(100);
do
{
findResults = service.FindItems(WellKnownFolderName.Inbox, sf, view);
if (findResults.Items.Count > 0)
{
foreach (var item in findResults.Items)
{
item.Load();
var emailMessage = item as EmailMessage;
if (!string.IsNullOrEmpty(emailMessage.Subject))
{
if (!emailMessage.Subject.ToLower().Contains("automatic reply") && !emailMessage.Subject.ToLower().Contains("otomatik yanıt"))
{
ReadMail(item as EmailMessage);
GC.SuppressFinalize(item);
}
else
{
emailMessage.IsRead = true;
emailMessage.Update(ConflictResolutionMode.AlwaysOverwrite);
}
}
else
{
ReadMail(item as EmailMessage);
GC.SuppressFinalize(item);
}
}
}
view.Offset = findResults.NextPageOffset.GetValueOrDefault(0);
GC.SuppressFinalize(findResults);
} while (findResults.MoreAvailable);
GC.SuppressFinalize(view);
}
catch (Exception ex)
{
//Debug.WriteLine(string.Format("Operate Error {0}.", ex.Message));
Logger.WriteLog(ex);
}

Sending Email using hosting Mail

I am trying to send Email from my company mail , when i use this code
i got
public String SendMail(String Email)
{
try
{
var client = new SmtpClient("smtp.gmail.com",587)
{
Credentials = new System.Net.NetworkCredential("************#itsans.com", "*********"),
EnableSsl = true
};
// client.UseDefaultCredentials = false;
String VerCode = CreateRandomCode(4);
AppUserBusiness appuser = new AppUserBusiness();
String InsertVer = appuser.ForgotPassword(Email, VerCode);
if (InsertVer == "Done")
client.Send("*********#itsans.com", Email, "iBlink Verification", "Your Verification Code is :" + VerCode);
return InsertVer;
}
catch (Exception Ex)
{
Logging.WriteToFile(Ex.Message, Ex.StackTrace);
return "Fail";
}
}
{"Unable to connect to the remote server"}
{"A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 72.167.238.29:587"}

Sending e-mail from Gmail in Xamarin.Forms app

I am trying to send e-mail from within a Xamarin Forms app, using Gmail.
I have created an Interface with only 1 method: SendEmail();
Then, in the Droid project, I added a class which implements said interface. Using the Dependency attribute and getting the implementation of the method in the main project, all is fine, except the following error:
Could not resolve host 'smtp.gmail.com'
This is the actual implementation of the method:
string subject = "subject here ";
string body= "body here ";
try
{
var mail = new MailMessage();
var smtpServer = new SmtpClient("smtp.gmail.com", 587);
mail.From = new MailAddress("myEmailAddress#gmail.com");
mail.To.Add("anotherAddress#yahoo.com");
mail.Subject = subject;
mail.Body = body;
smtpServer.Credentials = new NetworkCredential("username", "pass");
smtpServer.UseDefaultCredentials = false;
smtpServer.EnableSsl = true;
smtpServer.Send(mail);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
}
Searching around I could not find any details regarding it other that the actual smtp address.
Also, I have used the Less Secure apps procedure from Google, not receiving a credentials error I assume that it can connect to the account just fine.

Hello I have achieve this using the code below, also I have attached a file to the email, using the dependency service I use this methods:
Android:
public static string ICSPath
{
get
{
var path = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, StaticData.CalendarFolderName);
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
return Path.Combine(path, StaticData.CalendarFileName);
}
}
public async Task<bool> ShareCalendarEvent(List<ISegment> segmentList)
{
Intent choserIntent = new Intent(Intent.ActionSend);
//Create the calendar file to attach to the email
var str = await GlobalMethods.CreateCalendarStringFile(segmentList);
if (File.Exists(ICSPath))
{
File.Delete(ICSPath);
}
File.WriteAllText(ICSPath, str);
Java.IO.File filelocation = new Java.IO.File(ICSPath);
var path = Android.Net.Uri.FromFile(filelocation);
// set the type to 'email'
choserIntent.SetType("vnd.android.cursor.dir/email");
//String to[] = { "asd#gmail.com" };
//emailIntent.putExtra(Intent.EXTRA_EMAIL, to);
// the attachment
choserIntent.PutExtra(Intent.ExtraStream, path);
// the mail subject
choserIntent.PutExtra(Intent.ExtraSubject, "Calendar event");
Forms.Context.StartActivity(Intent.CreateChooser(choserIntent, "Send Email"));
return true;
}
iOS:
public static string ICSPath
{
get
{
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), StaticData.CalendarFolderName);
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
return Path.Combine(path, StaticData.CalendarFileName);
}
}
public async Task<bool> ShareCalendarEvent(List<ISegment> segmentList)
{
//Create the calendar file to attach to the email
var str = await GlobalMethods.CreateCalendarStringFile(segmentList);
if (File.Exists(ICSPath))
{
File.Delete(ICSPath);
}
File.WriteAllText(ICSPath, str);
MFMailComposeViewController mail;
if (MFMailComposeViewController.CanSendMail)
{
mail = new MFMailComposeViewController();
mail.SetSubject("Calendar Event");
//mail.SetMessageBody("this is a test", false);
NSData t_dat = NSData.FromFile(ICSPath);
string t_fname = Path.GetFileName(ICSPath);
mail.AddAttachmentData(t_dat, #"text/v-calendar", t_fname);
mail.Finished += (object s, MFComposeResultEventArgs args) =>
{
//Handle action once the email has been sent.
args.Controller.DismissViewController(true, null);
};
Device.BeginInvokeOnMainThread(() =>
{
UIApplication.SharedApplication.KeyWindow.RootViewController.PresentViewController(mail, true, null);
});
}
else
{
//Handle not being able to send email
await App.BasePageReference.DisplayAlert("Mail not supported",
StaticData.ServiceUnavailble, StaticData.OK);
}
return true;
}
I hope this helps.

Figured it own finally!
First of all, I was using Android Player by Xamarin, which apparently does not support network connectivity.
So my fix was easy: used an Android Emulator ( any version of it for that matter ) built in Visual Studio Community 2015, and tested network connectivity using the plugin by James Montemagno ( Xam.Plugin.Connectivity on NuGet ).

AutodiscoverLocalException: The Autodiscover service couldn't be located

I want to access exchange server by using .NET 3.5. Here is my code:
class Program
{
static void Main(string[] args)
{
try
{
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP1);
service.Credentials = new WebCredentials("email_test#xxx.com", "abcd");
service.AutodiscoverUrl("email_test#xxx.com");
EmailMessage message = new EmailMessage(service);
message.Subject = "Interesting";
message.Body = "The proposition has been considered.";
message.ToRecipients.Add("abc#xxx.com");
message.SendAndSaveCopy();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
}
I am referring this article to write the codes:
But I receive this exception:
AutodiscoverLocalException: The Autodiscover service couldn't be located.
Anyone can help?

I had this issue and it was due the user account being locked out.

service.Credentials = new WebCredentials("<loginID..not email address>", "< the pw>");
service.AutodiscoverUrl("<your emailaddress>",RedirectionUrlValidationCallback);