Report to see messages sent from SAP

Dear All,

it might sound a bit silly, but I cannot find the report to see all the messages (e.g. confirmations, invoice sent out from the mail invoice tab ect.) in SAP.

I have found the report before, but now I cannot seem to remember the name or the TCode.

Could anyone help me? I would mainly like to see the invoice that we mailed out from the reservations to external email addresses.

Thank you kindly for the replies in advance!