[Exim] acl_check_rcpt question

Quick question about Exim's default ACL "acl_check_rcpt":

# Accept if the address is in a domain for which we are relaying, but again,
# only if the recipient can be verified.

   accept  domains       = +relay_to_domains
           endpass
           message       = unrouteable address
           verify        = recipient

I understand the logic of the first portion, but how can "verify =
recipient" work if the user is a non-local user? That is, what does the
"verify = recipient" in the above example actually do?

Thanks.

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Mike Bacher / mike@???
SparkLogic Development / ISP Consulting
Use OptiGold ISP? Check out OptiSkin!
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