[postfix-es] bogus HELO name used

[Oscar Mauricio Cruz Lazo]

Hi all

I runnig a postfix server but now i notice Emails from my server is being
blocked by some ISPs because they claim it has a bogus helo,
I just checked the list and my IP is not listed as a spammer,

this only happens to certain email addresses, 97% of mail still goes through
fine, just the odd one.

my dns is working good

not sure what is causing this ?

thanks in advanced
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