How can I control whether incoming email is accepted, denied, or relayed when using Sendmail?
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The file /etc/mail/access is used to accept, deny, or relay incoming email. This file controls access to users, entire domains, or an entire IP subnet. The first column specifies a user, domain, or subnet. The second column can be one of the following values:
REJECT
rejects the sender with a general purpose message
OK
accepts mail for receipt (not relay)
RELAY
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