different types of pattern for each case are described, but first we cover some
general facilities that apply to all four kinds of list.
+.new
+Note that other parts of Exim use a &'string list'& which does not
+support all the complexity availible in
+domain, host, address and local part lists.
+.wen
+
.section "Expansion of lists" "SECID75"
This forces an expansion failure (see section &<<SECTforexpfai>>&);
{<&'string1'&>} must be present for &"fail"& to be recognized.
-If {<&'string2'&>} is omitted an empty string is substituted on
+If {<&'string2'&>} is omitted an empty string is substituted on
search failure.
If {<&'string1'&>} is omitted the search result is substituted on
search success.
and &"yes"& if it was.
.new
Results that are labelled as authoritive answer that match
-the $%dns_trust_aa%$ configuration variable count also
+the &%dns_trust_aa%& configuration variable count also
as authenticated data.
.wen
.row &%dns_ipv4_lookup%& "only v4 lookup for these domains"
.row &%dns_retrans%& "parameter for resolver"
.row &%dns_retry%& "parameter for resolver"
-.row &%dns_trust_aa%& "nameservers trusted as authentic"
+.row &%dns_trust_aa%& "DNS zones trusted as authentic"
.row &%dns_use_edns0%& "parameter for resolver"
.row &%hold_domains%& "hold delivery for these domains"
.row &%local_interfaces%& "for routing checks"
.new
-.option dns_trust_aa main domain list&!! unset
+.option dns_trust_aa main "domain list&!!" unset
.cindex "DNS" "resolver options"
.cindex "DNS" "DNSSEC"
-If this option is set then lookup results marked with an AA bit
-(Authoratative Answer) are trusted when they come from one
-of the listed domains, as if they were marked as having been
-DNSSEC-verified.
-
-Use this option only if you talk directly to the resolver
-for your local domains, and list only it.
-It is needed when the resolver does not return an AD bit
-for its local domains.
-The first SOA or NS record appearing in the results is compared
-against the option value.
+If this option is set then lookup results marked with the AA bit
+(Authoritative Answer) are trusted the same way as if they were
+DNSSEC-verified. The authority section's name of the answer must
+match with this expanded domain list.
+
+Use this option only if you talk directly to a resolver that is
+authoritive for some zones and does not set the AD (Authentic Data)
+bit in the answer. Some DNS servers may have an configuration option to
+mark the answers from their own zones as verified (they set the AD bit).
+Others do not have this option. It is considered as poor practice using
+a resolver that is an authoritive server for some zones.
+
+Use this option only if you really have to (e.g. if you want
+to use DANE for remote delivery to a server that is listed in the DNS
+zones that your resolver is authoritive for).
+
+If the DNS answer packet has the AA bit set and contains resource record
+in the answer section, the name of the first NS record appearing in the
+authority section is compared against the list. If the answer packet is
+authoritive but the answer section is empty, the name of the first SOA
+record in the authoritive section is used instead.
.wen
-
.cindex "DNS" "resolver options"
.option dns_use_edns0 main integer -1
.cindex "DNS" "resolver options"
This option can be used to enable the Per-Recipient Data Response extension
to SMTP, defined by Eric Hall.
If the option is set, PRDR is advertised by Exim when operating as a server.
-If the client requests PRDR, and more than one recipient, for a message
+If the client requests PRDR, and more than one recipient, for a message
an additional ACL is called for each recipient after the message content
is recieved. See section &<<SECTPRDRACL>>&.
If you use a remote host,
you need to make Exim's spool directory available to it,
as the scanner is passed a file path, not file contents.
-For information about available commands and their options you may use
+For information about available commands and their options you may use
.code
$ socat UNIX:/var/run/avast/scan.sock STDIO:
FLAGS
.new
Support is also provided for Rspamd.
-For more information about installation and configuration of SpamAssassin or
+For more information about installation and configuration of SpamAssassin or
Rspamd refer to their respective websites at
&url(http://spamassassin.apache.org) and &url(http://www.rspamd.com)
.wen
nicely, however.
.oindex "&%spamd_address%&"
-By default, SpamAssassin listens on 127.0.0.1, TCP port 783 and if you
+By default, SpamAssassin listens on 127.0.0.1, TCP port 783 and if you
intend to use an instance running on the local host you do not need to set
&%spamd_address%&. If you intend to use another host or port for SpamAssassin,
you must set the &%spamd_address%& option in the global part of the Exim
The &*-C*& option is used to specify an alternate &_exim.conf_& which might
contain alternate exim configuration the queue management might be using.
-to obtain a queue listing, and then greps the output to select messages
+to obtain a queue listing, and then greps the output to select messages
that match given criteria. The following selection options are available:
.vlist
projects / exim.git / blobdiff