This read-only property returns attachment by its index.
Use this property to get attachment by its index.
If you deal with attached file use
FileName property to get/set its name.
Since attachments are usually attached to the message itself (i.e. as parts of the multipart message), quick way to add an attachment is use TElMessage.AttachData or TElMessage.AttachFile. To delete an attachment use DeletePart method.