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