Date: 2004-05-20T07:40:30
Editor: NoelBergman <[EMAIL PROTECTED]>
Wiki: Apache James Wiki
Page: VirtualHostGuide
URL: http://wiki.apache.org/james/VirtualHostGuide
no comment
Change Log:
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@@ -1,3 +1,9 @@
-Virtual hosting is when a single mail host accepts mail for multiple domains.
Unlike HTTP with its 'host' header feature IMAP/POP3 have no native way of
specifying which domain a user belongs too. As such virtual hosting is done
using various hacks on other mail servers. For example, often the username
needs to be specified as '[EMAIL PROTECTED]' rather than plain 'joe' in an
IMAP/POP3 virtual hosting scheme. James doesn't support these virtual hacks
right now.. Here is a link to a user who has simulated virtual hosting with
James and how he did it..
+Virtual hosting is when a single mail host accepts mail for multiple domains.
James has full support for this feature, including a very capable
VirtualUserTable facility rivaling that in any other database server.
+
+The confusion about Virtual Hosting is that people make the naive assumption
that if you have [EMAIL PROTECTED] and [EMAIL PROTECTED], that just because
they receive e-mail as "joe@", that their POP3 account has the same name. This
is the issue that causes the most errors. However, the only real relationship
between an SMTP localpart ("joe" in our example) and the POP3 mailbox is the
relationship that the mail server creates. This is why your mail client (MUA)
has places to specify your POP3 login information, rather than using your
e-mail address. By default, in other words without a mapping, James would
expect to store and retrieve using the same key. However, as soon as you add a
mapping, that changes. So you can use joe-smith and joe-jones, or joe-domaina
and joe-domainb, or mailbox-1 and mailbox-2, or any other mapping that you wish
in order to have unique mailbox names. And that is what you use in your POP3
account.
+
+At present, James does not allow the use of "@" in a POP3 mailbox name. Some
people have made different patches to allow POP3 mailbox names of the type they
prefer. Here is a link to one such message from a user who has patched James
to accept and map the '@' symbol:
[http://www.mail-archive.com/server-user@james.apache.org/msg02349.html
Virtual hosting hack]
+
+At such point as James has POP3 mapping built-in, it is likely to be by
allowing the POP3 handler to access virtual user table information.
