locals: 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. virtualdomains: 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. smtproutes: 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 smarthost. For domains that your mail server will accept mail from the Internet, see `cat rcpthosts morercpthosts`. -M ----- Original Message ---- From: Dave Richardson <[EMAIL PROTECTED]> To: email@example.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 files: /var/qmail/control: locals rctphosts morercpthosts virtualdomains 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 customers/accounts/purpose/etc. 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! Dave.