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... zations
.gov and .mil for government and military agencies
.net for companies or golden flash animation organizations that run large networks.
Sites in the rest of the world tend to use a flash animation portugal two-letter code that
represents their country. flash animation portugal Most make sense, such as .ca for Canadian
sites, but there are a couple of seemingly odd ones. Swiss sites end
in .ch, while South African ones end in .za. Some U.S. sites have
followed this international convention (such as well.sf.ca.us).
You'll notice that the above addresses are all in lower-case.
Unlike almost everything else having anything at all to do nassau flash animation with Unix,
most Net mailing systems don't care about case, so you generally don't
have to worry about capitalizing e-mail addresses.
Alas, there are a few
exceptions -- some public-access flash animation portugal sites do allow for capital letters in
user names.
When in doubt, ask the person you want to write to, or let
her send you a message first (recall how a person's e-mail address is
usually found on the top of her message). The domain name, the part of the
address after the @ sign, never has to be capitalized.
It's all a fairly simple system that works very well, except,
again, it's vital to get the address exactly right -- just as you have
to dial a phone number exactly right.
Send a message to tomg@unm.edu flash animation portugal
(which is the University of flash animation portugal New Mexico) when you meant to send it to
tomg@umn.edu (the University of nassau flash animation Minnesota), and your letter will either
bounce back to you undelivered, or go to the wrong person.
If your message is bounced back to you as undeliverable, flash animation portugal you'll
get an ominous looking-message from MAILER-DAEMON (actually a rather
benign Unix program that exists to handle mail), with an evil-looking
header followed by the text of your message.
Sometimes, you can tell
what went wrong by looking at the first few lines of the bounced
message. Besides an incorrect address, it's possible your host system
does not have the other site in the "map" it maintains of other host
systems. Or you could be trying to send mail to another network, such
as Bitnet or flash animation portugal CompuServe, that has special addressing requirements.
Sometimes, figuring all this out can prove highly frustrating.
But remember the prime Net commandment: Ask. Send a message to your
system administrator. He or she might be able to help decipher the
problem.
There is one kind of address that may give your host system
particular problems. There are two main ways that Unix systems
exchange mail.
One is known as UUCP and started out with a different
addressing system than the rest of the Net.
Most UUCP systems have
since switched over to the standard Net addressing system, but a few
traditional sites still cling to their original type, which tends to
have lots of exclamation points in it, like this:
uunet!somesite!othersite!mybuddy
The problem for many host sites is that exclamation points (also
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