UUCP message may be limited. Larger message will be dropped. This is useful for slow modem link. Setting the maximum to 0 will disable this feature (no limit).
Enter the name of users for whom you want to defeat the mail host definition. Messages will always be stored locally for those users. This feature is normally used for administrative pseudo user (root for one).
You may want to defeat the "present your system as" field for some users. One is root. This allow the recipient to differentiate easily from which system (which root ?) the message originates.
Sendmail may use several format for some of its database.
It generally default to the dbm
format. Please note that
that some Sendmail only support one format (dbm). This is
a compile time option.