newaliases.ssmtp(1) - Linux man page
Name
newaliases - update /etc/aliases databaseSynopsis
newaliasesDescription
This is a link to the ssmtp binary. It invokes /usr/sbin/sendmail with the -bi option. It is provided for compatibility with the sendmail program.In this case it does absolutely nothing since sSMTP does not support /etc/aliases and is just there to avoid programs returning error messages.