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.forward        yes (empty files; can enable/disable mail to /file or |command)
/usr/mail       yes (compile time option)
/usr/spool/mail yes (compile time option)
/var/mail       yes (compile time option)
/var/spool/mail yes (compile time option)
:include:       yes (mail to /file and |command is off by default)
address probing yes (optional persistent database)
aliases         yes (can enable/disable mail to /file or |command)
bare newlines   yes (but will send CRLF)
blacklisting    yes (client name/addr; helo hostname; mail from; rcpt to)
connection caching yes (SMTP shared cache; LMTP shared cache)
content filter  yes (before and after queue, internal and external)
db tables       yes (compile time option)
dbm tables      yes (compile time option)
delivered-to    yes (configurable with prepend_delivered_header)
dsn             yes
enhanced status codes   yes
errors-to:      no (removed with Postfix 2.2)
esmtp           yes
etrn support    yes (per-destination log for authorized destinations only)
fcntl locking   yes (runtime configurable)
flock locking   yes (runtime configurable)
genericstable   yes (Postfix 2.2 generic(5) table)
greylist        yes (delegated policy script)
home mailbox    yes
ident lookup    no
ipv6            yes (compatibility for ipv4-only systems)
ldap tables     yes (contributed)
lmtp support    yes (client only)
luser relay     yes
m4 config       no
mail to command yes (configurable for .forward, aliases, :include:)
mail to file    yes (configurable for .forward, aliases, :include:)
maildir         yes (in home, system mailspool, /file/name/ alias)
mailertable     yes (it's called transport)
mailq           yes
majordomo       yes (edit approve script to delete /^delivered-to:/i)
milter          yes (except body replacement)
mime            yes (including 8bit to quoted-printable conversion)
mysql tables    yes (contributed)
netinfo tables  yes (contributed)
newaliases      yes (main alias database only)
nis tables      yes
nis+ tables     yes (contributed)
no <> in smtp   yes (most common address forms)
pgsql tables    yes (contributed)
pipeline option yes (SMTP server and client; LMTP client)
pop/imap        no
qmqp server     yes (with verp support)
rbl support     yes
return-receipt: no (use DSN NOTIFY=SUCCESS)
rhsbl support   yes
sasl support    yes (compile time option)
sendmail -bt    no
sendmail -bv    yes (sends delivery report via email)
sendmail -q     yes
sendmail -qRxxx yes (for domains specified in fast_flush_domains)
sendmail -qSxxx no
sendmail -qtime ignored
sendmail -v     yes (sends delivery report via email)
sendmail.cf     no (uses table-driven address rewriting)
size option     yes, server and client
smarthost       yes (specify relayhost in main.cf)
spf             yes (delegated policy script)
starttls        yes (compile time option)
tcp wrapper     no (use built-in blacklist facility)
user+extension  yes (also: .forward+extension)
user-extension  yes (also: .forward-extension)
user.lock       yes (runtime configurable)
uucp support    yes (sends user@domain recipients)
verp support    yes (delimiters are configurable)
virtual domains yes (via local delivery agent and via dedicated delivery agent)
year 2000 safe  yes

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