Provided by: opensmtpd_7.4.0p1-1build4_amd64 

NAME
mail.mboxfile — deliver mail to a file in mbox format
SYNOPSIS
mail.mboxfile file
DESCRIPTION
mail.mboxfile appends mail to a file in mbox format and acknowledges delivery success or failure with its exit status.
EXIT STATUS
The mail.mboxfile utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
mail(1), smtpd(8)