Struct trust_dns_proto::rr::rdata::mx::MX [−][src]
pub struct MX { /* fields omitted */ }
Expand description
RFC 1035, DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION, November 1987
3.3.9. MX RDATA format
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| PREFERENCE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/ EXCHANGE /
/ /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
MX records cause type A additional section processing for the host
specified by EXCHANGE. The use of MX RRs is explained in detail in
[RFC-974].
Implementations
RFC 1035, DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION, November 1987
PREFERENCE A 16 bit integer which specifies the preference given to
this RR among others at the same owner. Lower values
are preferred.
RFC 1035, DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION, November 1987
EXCHANGE A <domain-name> which specifies a host willing to act as
a mail exchange for the owner name.
Trait Implementations
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
RFC 1033, DOMAIN OPERATIONS GUIDE, November 1987
MX (Mail Exchanger) (See RFC-974 for more details.)
<name> [<ttl>] [<class>] MX <preference> <host>
MX records specify where mail for a domain name should be delivered.
There may be multiple MX records for a particular name. The
preference value specifies the order a mailer should try multiple MX
records when delivering mail. Zero is the highest preference.
Multiple records for the same name may have the same preference.
A host BAR.FOO.COM may want its mail to be delivered to the host
PO.FOO.COM and would then use the MX record:
BAR.FOO.COM. MX 10 PO.FOO.COM.
A host BAZ.FOO.COM may want its mail to be delivered to one of three
different machines, in the following order:
BAZ.FOO.COM. MX 10 PO1.FOO.COM.
MX 20 PO2.FOO.COM.
MX 30 PO3.FOO.COM.
An entire domain of hosts not connected to the Internet may want
their mail to go through a mail gateway that knows how to deliver
mail to them. If they would like mail addressed to any host in the
domain FOO.COM to go through the mail gateway they might use:
FOO.COM. MX 10 RELAY.CS.NET.
*.FOO.COM. MX 20 RELAY.CS.NET.
Note that you can specify a wildcard in the MX record to match on
anything in FOO.COM, but that it won't match a plain FOO.COM.
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