We use your recommended method to detect inline attachments in HTML emails
We have noticed that Outlook does not use the property 0x3716001F with value ‘inline’
or the test
if ((att.Properties.ContainsKey(0x3716001F) && att.GetPropertyString(0x3716001F) == “inline”)
|| (att.Properties.ContainsKey(0x3716001E) && att.GetPropertyString(0x3716001E) == “inline”))
to determine if an email is an inline attachment, but rather displays emails with this property
Do you have any additional guidance on the best technique to differentiate between Inline and Regular Attachments and/or emulate Outlook’s behaviour.