Hello :slight_smile:
I’ve attached a sample eml:
Dim xx As New Email.MailMessage
xx.Save(“d:\a.eml”)
a.zip (170 Bytes)
and email detect file format detects it as mhtml.
since you set:
X-Unsent: 1
by default, is t…...current behavior for backward compatibility. Until then, Headers.Remove("X-Unsent")...