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Subject: virtual maps: again
From: Michael Tokarev (mjttls.msk.ru)
Date: Wed Sep 20 2000 - 11:54:45 CDT

Hello!

Just found another bunch of funny problems with virtual maps.
Should things be so that them are now?

aliases:
  some1: mjt
  some2: mjt

 $ mail some1 some2 mjt <...
 mjt will receive three copies of mail. Ok, this was discussed and
looks like a right thing to do.

virtual (some1 and some2 removed from aliases):
  some1 mjt
  some2 mjt

 $ mail some1 some2 mjt
 mjt will get only one copy.

So: why aliases does not remove duplicates while virtual
"global aliases" does?

Also, and this one is rather interesting:

virtual:
  dom1.com virtual
  dom2.com virtual
  dom1.cop dom2.com
  user1dom2.com someaddr1
  user2dom2.com someaddr2

Mail sent to otherdom2.com will be rejected by smtpd.
But mail sent to otherdom1.com will not, but will be bounced
instead with "unknown user otherdom2.com" error.
So: why _smtpd_'s virtual lookup is not recursive as stated in
man virtual?
This example can be rewtitten equivalently with repeated
user1 and user2 entries for both domains, and all will be
ok. But it should (?) be ok in the first place, isn't it?

Also, and this was a real trouble until I figured it
myself:

  I have a unix "user", named "virtual.dom.ain" (yes, with
dots et al) to receive all mails for that domain into one
mailbox (target is a dial-up windoze machine, but domain
really needed; also I know headaches about receiving domain->mbox).
Ok, I wrote in virtual:

  virtual.dom.ain virtual
  virtual.dom.ain virtual.dom.ain$mydestination

And any mail sent to somevirtual.dom.ain bounces with
"unknown user virtual" error! :)
I changed virtual table so that it shows:

  virtual.dom.ain virtual.dom.ain
  virtual.dom.ain virtual.dom.ain$mydestination

and only so set it up the way I expected. This was a
trick, mostly dody one (that should introduce loop),
but it works.
So, -- does "anything" in "virtual.dom.ain anything"
as unimportant as stated in virtual man page ?! :)

Regards,
 Michael.