Adds a MimeAttachment to the end of the IMimeAttachmentList.
The IMimeAttachmentList index at which the value has been added.
Please refer to Add for details.
| Exception Type | Condition |
|---|---|
| NotSupportedException |
The IMimeAttachmentList is read-only. -or- The IMimeAttachmentList has a fixed size. |
IMimeAttachmentList Interface | SmtPop Namespace