With Sendmail's access database, you can selectively accept unqualified senders without globally allowing them with the accept_unqualified_senders feature. For example, the Remote System Console (RSC) cards on some of our Solaris servers send emails without a domain name.
To accept mail from rsc_card (without a domain name), we would use the following Sendmail access database entry:
From:rsc_card@ ok
Note that the "@" sign is required to selectively accept
unqualified sender addresses.
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