public static List <IEmailMessage> GetIncomingEmails(
string address,
bool loadHtmlBody = false,
CancellationToken cancellationToken = default)
{
Contract.Requires(!String.IsNullOrEmpty(address));
var settings = GetConnectionSettings(address);
List <IEmailMessage> GetEmails()
{
var service = new EWS.ExchangeService(settings.Version)
{
Url = new Uri(settings.Url)
};
if (settings.UseDefaultCredentials)
{
service.UseDefaultCredentials = true;
}
else
{
service.Credentials = new NetworkCredential(settings.UserName, settings.Password, settings.Domain);
}
var mailbox = new EWS.Mailbox(address);
var inboxFolderId = new EWS.FolderId(EWS.WellKnownFolderName.Inbox, mailbox);
var propertySet = new EWS.PropertySet(EWS.BasePropertySet.FirstClassProperties)
{
RequestedBodyType = EWS.BodyType.Text
};
if (loadHtmlBody)
{
propertySet.Add(new EWS.ExtendedPropertyDefinition(ExtendedProperty_HtmlBody, EWS.MapiPropertyType.Binary));
}
propertySet.Add(new EWS.ExtendedPropertyDefinition(ExtendedProperty_ConversationId, EWS.MapiPropertyType.Binary));
var view = new EWS.ItemView(100)
{
OrderBy = { { EWS.ItemSchema.DateTimeReceived, EWS.SortDirection.Ascending } },
PropertySet = propertySet
};
var emails = (from item in service.FindItems(inboxFolderId, view)
let email = item as EWS.EmailMessage
where email != null
select email).ToList();
if (emails.Count > 0)
{
propertySet.Add(EWS.ItemSchema.MimeContent);
service.LoadPropertiesForItems(emails, propertySet);
}
return(emails.ConvertAll(email => {
if (email.ItemClass == "IPM.Note.SMIME")
{
using (var memoryStream = new MemoryStream(email.MimeContent.Content))
{
memoryStream.Position = 0L;
var pkcs7Mime = (ApplicationPkcs7Mime)MimeEntity.Load(memoryStream);
CryptographyContext.Register(typeof(WindowsSecureMimeContext));
pkcs7Mime.Verify(out var mimeEntity);
var multipart = (Multipart)mimeEntity;
var body = multipart.OfType <TextPart>().FirstOrDefault()?.Text;
var message = multipart.OfType <TnefPart>().FirstOrDefault()?.ConvertToMessage();
return new EmailMessage(
email,
body,
message?.Attachments
.OfType <MimePart>()
.Select(mp => {
memoryStream.SetLength(0L);
using (var contentStream = mp.Content.Open())
{
contentStream.CopyTo(memoryStream);
}
return new FileAttachment(
mp.FileName,
memoryStream.ToArray());
})
.ToArray());
}
}
else
{
return (IEmailMessage) new EmailMessage(email);
}
}));
}
var retries = 0;
while (true)
{
try
{
return(GetEmails());
}
catch when(retries < settings.Retries)
{
//await Task.Delay(settings.RetryDelay, cancellationToken);
retries++;
}
}
}