Provided by: opensmtpd_7.7.0p0-1_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) Debian July 25, 2018 MAIL.MDA(8)