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List:       courier-users
Subject:    Re: [courier-users] Wildcard DNS + Courier?
From:       Jeff Potter <jpotter-courier () codepuppy ! com>
Date:       2003-11-18 3:37:31
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Hi,

I'm working on getting subdomains to work with wildcard dns. I'm still 
lost, but have tracked down that Courier doesn't even hit the DB with 
the mysql_select_clause, so my earlier thought of a "solution" won't 
work with Courier, as I understand it.

Sam, if the line ".foobar.com" is in esmtpacceptmailfor, why does the 
mail server accept RCPT TO's in any wildcard subdomain, but then not 
bother looking up the subdomain info in authlib? Secondary mx? Is there 
any historical reason why allowing wildcards in esmtpacceptmailfor, the 
authlib stuff, and aliases (eg, I'd want to define an alias for 
postmaster@.foobar.com) shouldn't be allowed?

best regards,
Jeff

> How can I set Courier up to accept mail for wildcard DNS? I'm using 
> authmysql / courier 0.44.  Here's what I would expect to work:
>
> 1.	mx record for *.foobar.com points at mx.myserver.com
> 2.	.foobar.com added in myserver's esmtpacceptmailfor (note the 
> leading '.')
> 3.	makeacceptmailfor
> 4.	add entry in mySql with email address defined as  user@.foobar.com  
> (note the '.' after the '@'; this is with mysql_select_clause)
> 5.	mail to user@blahBlahBlah.foobar.com accepted to homedir / uid / 
> gid as defined in SQL.
> 6.	If alias@.foobar.com is defined in one of the db entries, any mail 
> to anything@anywhere.foobar.com should be accepted as well.
>
> I'd also expect tight binding -- e.g., if  entry A has 
> user@.usa.foobar.com and entry B has user@.foobar.com are both 
> defined, any email under the *.usa.foobar.com domain would go to entry 
> A.  I'd expect to need 2 entries -- one for user@foobar.com, and 
> another for user@.foobar.com; otherwise there's no way to split them.
>
> The only thing I've been able to think of, short of writing a patch, 
> is adding an ugly SQL hack in the MYSQL_SELECT_CLAUSE. There's got to 
> be a better way...
>
> Courier Gurus, Help?
>
> as always,
> Many thanks,
> Jeff



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