Sendmail, 3rd Edition

Configuration File Feature Reference

In this section we detail each feature available when configuring with the mc configuration method. We list them briefly in Table 4-7, and explain them in greater detail in the text that follows. Note that a comprehensive list of all mc configuration macros and features is available in Appendix A.

Table 4-7. FEATURE( )s available with the mc configuration technique

FEATURE( )	§	Description
accept_unqualified_senders	FEATURE(accept_unqualified_senders)	Allow unqualified MAIL FROM:
accept_unresolvable_domains	FEATURE(accept_unresolvable_domains)	Accept unresolvable domains
access_db	Section 7.5	A database for mail policy
allmasquerade	FEATURE(allmasquerade)	Masquerade recipient as well as sender
always_add_domain	FEATURE(always_add_domain)	Add the local domain even on local mail
authinfo	FEATURE(authinfo)	Use a separate database for authentication information
bestmx_is_local	FEATURE(bestmx_is_local)	Accept best MX record as local if in $=w
bitdomain	FEATURE(bitdomain)	Convert BITNET addresses into Internet addresses (deprecated)
blacklist_recipients	Section 7.5.5	Look up recipients in access database
compat_check	FEATURE(compat_check)	Screen sender/recipient pairs
delay_checks	Section 7.5.6	Check SMTP RCPT TO: first
dnsbl	Section 7.2	Reject based on various DNS blacklists
domaintable	FEATURE(domaintable)	Rewrite old domain as equivalent to new domain
enhdnsbl	Section 7.2.2	Enhanced dnsbl lookups
generics_entire_domain	FEATURE(generics_entire_domain)	Match subdomains in generics table
genericstable	FEATURE(genericstable)	Transform sender addresses
ldap_routing	ldap (was ldapx)	Reroute recipients based on LDAP lookups
limited_masquerade	FEATURE(limited_masquerade)	Only masquerade MASQUERADE_DOMAIN hosts
local_lmtp	FEATURE(local_lmtp)	Deliver locally with LMTP and mail.local
local_no_masquerade	FEATURE(local_no_masquerade)	Don’t masquerade local mail
local_procmail	FEATURE(local_procmail)	Use procmail(1), etc. as local delivery agent
lookupdotdomain	FEATURE(lookupdotdomain)	Enable .domain secondary access.db lookups
loose_relay_check	Section 7.4.2	Allow %-hack relaying
mailertable	FEATURE(mailertable)	Database selects new delivery agents
masquerade_entire_domain	FEATURE(masquerade_entire_domain)	Masquerade all hosts under a domain
masquerade_envelope	FEATURE(masquerade_envelope)	Masquerade the envelope as well as headers
msp	FEATURE(msp)	Create a mail submission cf file
nocanonify	FEATURE(nocanonify)	Don’t canonify with $[ and $]
nodns	FEATURE(nodns)	Omit DNS support from configuration file (deprecated)
no_default_msa	FEATURE(no_default_msa)	Disable automatic listening on MSA port 587
notsticky	FEATURE(notsticky)	Don’t differ unqualified versus qualified addresses
nouucp	FEATURE(nouucp)	Eliminate all UUCP support
nullclient	FEATURE(nullclient)	Relay all mail through a mail host
preserve_local_plus_detail	FEATURE(preserve_local_plus_detail)	Retain plussed addresses for delivery
preserve_luser_host	FEATURE(preserve_luser_host)	Preserve recipient host with LUSER_RELAY
promiscuous_relay	Section 7.4.3	Allow unbridled relaying
queuegroup	FEATURE(queuegroup)	Select queue groups via the access database
rbl	FEATURE(rbl)	Reject connections based on rbl.maps.vix.com (V8.9 through V8.11)
redirect	FEATURE(redirect)	Add support for address.REDIRECT aliases
relay_based_on_MX	Section 7.4.4	Relay based on MX records
relay_entire_domain	Section 7.4.5	Relay based on $=m in addition to $=w
relay_hosts_only	Section 7.4.6	Relay individual hosts, not domains
relay_local_from	Section 7.4.7	Relay based on $=w and MAIL FROM:
relay_mail_from	Section 7.4.8	Relay based on MAIL FROM: and RELAY in access_db
smrsh	Section 5.8.2	Use smrsh (sendmail restricted shell)
stickyhost	FEATURE(stickyhost)	Differ unqualified from qualified addresses
use_ct_file	FEATURE(use_ct_file)	Use /etc/mail/trusted-users for trusted users
use_cw_file	FEATURE(use_cw_file)	Use /etc/mail/local-host-names for local hosts
uucpdomain	FEATURE(uucpdomain)	Convert UUCP hosts via a database (deprecated)
virtuser_entire_domain	FEATURE(virtuser_entire_domain)	Match subdomains in the virtual user table
virtusertable	FEATURE(virtusertable)	Support for virtual domains

Note that this reference is not comprehensive. Options, sendmail macros, and delivery agents, for example, are described in chapters dedicated to those topics.