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SMTP HELO/EHLO Configuration Sendmail

stackandpop
stackandpop asked
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Last Modified: 2012-07-10
I am using a Linux Server RHEL4 and it's getting blacklisted due to the following:

Note: xx.xx.xx.xx appeared to be suspicious because it was using the
following name to identify itself during email (port 25) connections
via the SMTP HELO/EHLO commands:

        4x.4.1x.8x

How can I set my server's response or identity?  I assume that it is some sendmail configuration?
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