Domains that the server should deliver as local rather than sending off to 
other people.  When you send mail to your own domain, it knows to not deliver 
it to the MX of that domain by its presence in the locals file

rcpthosts / morercpthosts:
    Domains that the SMTP daemon should receive mail for (allow) without the 
presence of RELAYCLIENT as set in tcp.smtp or by SMTP authentication.  Domains 
in here will always be accepted, and domains not in here will be rejected 
unless relaying is allowed.  morercpthosts is just a continuation, with your 
most popular domains to be in rcpthosts, just for speed of lookup.  In modern 
fast systems, it doesn't matter.

    A list of the prepended strings by domains, allowing the system to prepend 
an identifier based on the domain in question.  This converts [EMAIL PROTECTED] 
to [EMAIL PROTECTED] for later processing.

    A list of domains and their artificial MX server to send mail to.  Domains 
in here should also be in rcpthosts, but not treated as local.  Use this if you 
are delivering mail to another MX for select domains, or if you have a 

For domains that your mail server will accept mail from the Internet, see `cat 
rcpthosts morercpthosts`.


----- Original Message ----
From: Dave Richardson <[EMAIL PROTECTED]>
To: vchkpw@inter7.com
Sent: Thursday, January 18, 2007 10:39:27 AM
Subject: [vchkpw] which files truly determine "relay" into a qmail server

I've been asked to admin an old, jumbled install of qmail/vpopmail (many 
are local users, many are vpopmail users with .cdb).  I'm having a brain 
cramp because the install has domains splattered all over the following 


My exercise is to identify ONLY those domains that the server will 
actually accept delivery for from the Internet so that we can start 
pruning away the domains that seems to be lingering with no 

My intention/belief was that ONLY 'rcpthosts' and 'morerctphosts' govern 
which domains the server will accept delivery/relay for from the 
outside.  Thus, I felt that if I built a master list from these two 
files, any other domains I might find are automatically "unused".

However this install has a number of domains that are aliases in the 
'locals' file to a single local account and the domains only seem to 
appear in 'locals'.

Does 'locals' (or 'virtualdomains') in any way influence the relay 
decision to accept incoming mail?  Or am I right that ONLY 'rcpthosts' 
and 'morercpthosts' define the permitted domains.

Sorry for the long explanation, validation/help is much appreciated!

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