private void CopyMessages(IMailFolder folder, IMailFolder dest)
{
try
{
folder.Open(FolderAccess.ReadOnly);
dest.Open(FolderAccess.ReadWrite);
UniqueIdRange r = new UniqueIdRange(UniqueId.MinValue, UniqueId.MaxValue);
var headers = new HashSet <HeaderId>();
headers.Add(HeaderId.Received);
headers.Add(HeaderId.Date);
headers.Add(HeaderId.MessageId);
headers.Add(HeaderId.Subject);
headers.Add(HeaderId.From);
headers.Add(HeaderId.To);
headers.Add(HeaderId.Cc);
headers.Add(HeaderId.ResentMessageId);
var msgList = folder.Fetch(r,
MessageSummaryItems.UniqueId
| MessageSummaryItems.InternalDate
| MessageSummaryItems.Flags, headers);
int total = msgList.Count;
int i = 1;
foreach (var msg in msgList)
{
Console.WriteLine($"Copying {i++} of {total}");
CopyMessage(msg, folder, dest);
if (i % 100 == 0)
{
dest.Check();
}
}
}
finally
{
folder.Close();
dest.Close();
}
}