* On 08/07/06 12:03 -0400, My BSD wrote:
| Running an instance of Exim version 4.62 on an OSX 10.4.6 former
| IBook.
|
| Set up to accept external incoming mail for three domains for
| existing users (unless it contains a virus) and to reject all mail for
| non-existent users (except Postmaster) at RCPT time.
|
| Accepted mail is relayed to an internal proprietary server for
| processing, etc.
|
| The
| "acl_check_rcpt:"
| "accept domains = +local_domains"
| "verify = recipient"
| configuration setting was not rejecting mail to non-existent users
| (perhaps because there are no local users on the server, it had no
| way to verify them, I'm not sure).
|
| I adapted an over-quota reject router that I found on the Net (lost the
| URL, sorry) as follows:
|
| Unknown_recipient:
| driver = redirect
| domains = +local_domains
| local_parts = !lsearch;/opt/local/etc/exim/virtual_users
| data = :fail:Unknown recipient!
| allow_fail
|
| Created the "/opt/local/etc/exim/virtual_users" file listing all legal
| users.
|
| To my surprise, it worked.
|
| Two questions:
|
| 1. Is anything basically flawed with this router?
|
| 2. Mail to a non-existent user in a domain is accepted if the user
| exists in one of the other local domains. How to tighten it up to
| reject by local_part@domain?
# This statement accepts the incoming recipient address if the domain is one of
# domains for which this host is a relay, but again, only if the address can
# be verified.
accept domains = +relay_to_domains
endpass
message = Unrouteable address.
verify = recipient/callout=10s,use_sender,defer_ok
The "verify = " was modified by me. Read spec.txt.
The clue you need is "recipient verification"
cheers
- wash
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