Tommy Phipps wrote: > Our company is receiving spoofed emails using our domain name along with > many combinations of user names. > > I'm wondering if Exim can be set up to detect these spoofed messages to keep > them from being passed to Exchange. > > Thanks in advance for your help. >
Perhaps you could just block emails from yourdomain if they don't come
from your internal range.
A rule like this one should do it.
deny
!hosts = : +relay_from_hosts
sender_domains = +local_domains
message = You are not authenticated
smime.p7s
Description: S/MIME Cryptographic Signature
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