1.forward yes (empty files; can enable/disable mail to /file or |command) 2/usr/mail yes (compile time option) 3/usr/spool/mail yes (compile time option) 4/var/mail yes (compile time option) 5/var/spool/mail yes (compile time option) 6:include: yes (mail to /file and |command is off by default) 7address probing yes (optional persistent database) 8aliases yes (can enable/disable mail to /file or |command) 9bare newlines yes (but will send CRLF) 10blacklisting yes (client name/addr; helo hostname; mail from; rcpt to) 11connection caching yes (SMTP shared cache; LMTP shared cache) 12content filter yes (before and after queue, internal and external) 13db tables yes (compile time option) 14dbm tables yes (compile time option) 15delivered-to yes (configurable with prepend_delivered_header) 16dsn yes 17enhanced status codes yes 18errors-to: no (removed with Postfix 2.2) 19esmtp yes 20etrn support yes (per-destination log for authorized destinations only) 21fcntl locking yes (runtime configurable) 22flock locking yes (runtime configurable) 23genericstable yes (Postfix 2.2 generic(5) table) 24greylist yes (delegated policy script) 25home mailbox yes 26ident lookup no 27ipv6 yes (compatibility for ipv4-only systems) 28ldap tables yes (contributed) 29lmtp support yes (client only) 30luser relay yes 31m4 config no 32mail to command yes (configurable for .forward, aliases, :include:) 33mail to file yes (configurable for .forward, aliases, :include:) 34maildir yes (in home, system mailspool, /file/name/ alias) 35mailertable yes (it's called transport) 36mailq yes 37majordomo yes (edit approve script to delete /^delivered-to:/i) 38milter yes (except body replacement) 39mime yes (including 8bit to quoted-printable conversion) 40mysql tables yes (contributed) 41netinfo tables yes (contributed) 42newaliases yes (main alias database only) 43nis tables yes 44nis+ tables yes (contributed) 45no <> in smtp yes (most common address forms) 46pgsql tables yes (contributed) 47pipeline option yes (SMTP server and client; LMTP client) 48pop/imap no 49qmqp server yes (with verp support) 50rbl support yes 51return-receipt: no (use DSN NOTIFY=SUCCESS) 52rhsbl support yes 53sasl support yes (compile time option) 54sendmail -bt no 55sendmail -bv yes (sends delivery report via email) 56sendmail -q yes 57sendmail -qRxxx yes (for domains specified in fast_flush_domains) 58sendmail -qSxxx no 59sendmail -qtime ignored 60sendmail -v yes (sends delivery report via email) 61sendmail.cf no (uses table-driven address rewriting) 62size option yes, server and client 63smarthost yes (specify relayhost in main.cf) 64spf yes (delegated policy script) 65starttls yes (compile time option) 66tcp wrapper no (use built-in blacklist facility) 67user+extension yes (also: .forward+extension) 68user-extension yes (also: .forward-extension) 69user.lock yes (runtime configurable) 70uucp support yes (sends user@domain recipients) 71verp support yes (delimiters are configurable) 72virtual domains yes (via local delivery agent and via dedicated delivery agent) 73year 2000 safe yes 74