আরএফসি 822 বলেছেন:
6.3. RESERVED ADDRESS
It often is necessary to send mail to a site, without know-
ing any of its valid addresses. For example, there may be mail
system dysfunctions, or a user may wish to find out a person's
correct address, at that site.
This standard specifies a single, reserved mailbox address
(local-part) which is to be valid at each site. Mail sent to
that address is to be routed to a person responsible for the
site's mail system or to a person with responsibility for general
site operation. The name of the reserved local-part address is:
Postmaster
so that "Postmaster@domain" is required to be valid.
Note: This reserved local-part must be matched without sensi-
tivity to alphabetic case, so that "POSTMASTER", "postmas-
ter", and even "poStmASteR" is to be accepted.
তেমনি, আরএফসি 5321 বলে:
4.5.1. Minimum Implementation
[...]
Any system that includes an SMTP server supporting mail relaying or
delivery MUST support the reserved mailbox "postmaster" as a case-
insensitive local name. [...] The requirement to accept mail for
postmaster implies that RCPT commands that specify a mailbox for
postmaster at any of the domains for which the SMTP server provides
mail service, as well as the special case of "RCPT TO:<Postmaster>"
(with no domain specification), MUST be supported.
SMTP systems are expected to make every reasonable effort to accept
mail directed to Postmaster from any other system on the Internet.
যখন কোনও নেটিজেন কোনও ডোমেনের মুখোমুখি হয় যা সে অনুযায়ী আচরণ করতে ব্যর্থ হয়, তখন সেখানে কি আর কিছু আছে যে সে ডোমেইন নিয়ামককে আরএফসি-র প্রয়োগ করতে বাধ্য করতে পারে, তা ছাড়াও ডোমেইনটি আরএফসি- ক্লিউলেস.আর.গ্রে জমা দেওয়ার পাশাপাশি ( rfc-ignorant.org এর প্রতিস্থাপন ) )?
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