IOW: Which of the following are required vice recommended vice
best practives, etc.
a) postmaster@example.com
b) postmaster@mail.example.com
c) postmaster@wizzbang.example.com
d) postmaster@pop.example.com
e) postmaster@cisco.example.com
and most important to me: where to I go to justify the
decisions on same?
2821 (section 4.5.1) says that "postmaster" (with no domain" must be
accepted as:
(a) a local name (with no domain specified, as in: RCPT TO:<Postmaster>"
(b) A mailbox at every domain for which the mail server accepts mail.
That means that the answer to your five questions are are:
a) postmaster@example.com is required if any mail addressed to
@example.com is accepted.
b) postmaster@mail.exam is required if any mail addressed to
@mail.example.com is accepted.
c), d), e) follow the example above.
Had you also included:
f) postmaster
The answer would be "yes, that is required".
RFC2821 would be a good place to go to justify decisions on same.
(Well, to justify a decision to implement
postmaster@any.domain.for.which.mail.is.accepted, and to implement
"postmaster". It wouldn't really help you justify a decision to not
implement that. OTOH, if someone is arguing that the the mere
existance of xyz.com implies that postmaster@xyz.com must exist, then I
would note that neither RFC2821 nor any other RFC of which I am aware
imposes such a requirement. As long as @xyz.com isn't being used for
any mail, there is no requirement for postmaster@xyz.com to exist.)
-- Brett
[snip]
RFC2821 would be a good place to go to justify decisions on same.
(Well, to justify a decision to implement
postmaster@any.domain.for.which.mail.is.accepted, and to implement
"postmaster". It wouldn't really help you justify a decision to not
implement that. OTOH, if someone is arguing that the the mere
existance of xyz.com implies that postmaster@xyz.com must exist, then I
would note that neither RFC2821 nor any other RFC of which I am aware
imposes such a requirement. As long as @xyz.com isn't being used for
any mail, there is no requirement for postmaster@xyz.com to exist.)
Some country-TLD registrars do have this requirement, however.
Greetz, Peter
Some country-TLD registrars do have this requirement, however.
hmm. related question here then - webmaster@ addresses?
assuming www.xxx.com and www.subsite.xxx.com, is it required / best practice
to support
a) just webmaster@xxx.com
b) webmaster@ for each subsite
c) some appropriate email address (referenced on the site) not in the same
domain (if website domain != email domain)
Yo David!
The answer is "b".
Check out RFC 2142 "MAILBOX NAMES FOR COMMON SERVICES, ROLES AND FUNCTIONS".
"If a host is not configured to accept mail directly, but it implements
a service for which this specification defines a mailbox name, that host
must have an MX RR set (see [RFC974]) and the mail exchangers specified
by this RR set must recognize the referenced host's domain name as
"local" for the purpose of accepting mail bound for the defined mailbox
name. Note that this is true even if the advertised domain name is not
the same as the host's domain name; for example, if an NNTP server's
host name is DATA.RAMONA.VIX.COM yet it advertises the domain name
VIX.COM in its "Path:" headers, then mail must be deliverable to both
<USENET@VIX.COM> and <USENET@DATA.RAMONA.VIX.COM>, even though these
addresses might be delivered to different final destinations."
RGDS
GARY