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       This  manual  page gives a brief introduction to SMTP mail
       addresses, as used on the Internet.  These  addresses  are
       in the general format


       where  a  domain  is  a hierarchical dot separated list of
       subdomains.  For example, the addresses

            Eric Allman <eric@monet.berkeley.edu>
            eric@monet.berkeley.edu (Eric Allman)

       are valid forms of the same address.

       The domain part (``monet.berkeley.edu'') may be  the  name
       of  an internet host, or it may be a logical mail address.
       The domain part is not case sensitive.

       The local part (``eric'') is often a user  name,  but  its
       meaning  is defined by the local software.  It can be case
       sensitive, but usually isn't.  If  you  see  a  local-part
       that  looks like garbage, it is usually because of a gate­
       way between an internal e-mail system and  the  net,  here
       are some examples:


       (These are, respectively, an X.400 gateway, a  gateway  to
       an  arbitrary inernal mail system that lacks proper inter­
       net support, an UUCP gateway, and the  last  one  is  just
       boring username policy.)

       The  real-name part (``Eric Allman'') can either be placed
       first, outside <>, or last, inside ().  (Strictly speaking
       the two aren't the same, but the difference is outside the
       scope of this page.)  The name may have to be quoted using
       "" if it contains certain characters, most commonly ``.'':

            "Eric P. Allman" <eric@monet.berkeley.edu>

       Many mail systems let users abbreviate  the  domain  name.
       For  instance,  users  at  berkeley.edu  may get away with
       ``eric@monet'' to send mail to Eric Allman. This  behavior
       is deprecated.

       these  are  generally  augmented  by  the software at each
       host.  It is generally possible  to  ignore  all  but  the
       ``user@hostc'' part of the address to determine the actual

       Every site is required to have a user or user alias desig­
       nated  ``postmaster'' to which problems with the mail sys­
       tem may be addressed.  The ``postmaster'' address  is  not
       case sensitive.

       rtfm.mit.edu  and many mirrors store a collection of FAQs.
       Please find and use a nearby FAQ archive; there are dozens
       or  hundreds  around  the world.  mail/inter-network-guide
       explains how to send mail between many different networks.
       mail/country-codes  lists  the  top  level  domains  (e.g.
       ``no'' is Norway and ``ea''  is  Eritrea).   mail/college-
       email/part* gives some useful tips on how to locate e-mail




       binmail(1), mail(1), mconnect(1), forward(5),  aliases(5),
       sendmail(8),  vrfy(8),  RFC822 (Standard for the Format of
       Arpa Internet Text Messages).

linux                       1995-06-24                MAILADDR(7)
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