Thanks Erel!
I tried with 10 lines and it works fine!
Now the time spend to parse the mails is very good!
My final target is to donwload the attachment when I reach the mail with the correct subject.
In others words, I known that the target mail must be a mail with a send date of today date.
There is a way to switch from .DownloadMessageTop() to .DownloadMessage when the mail send date is less than the today date?