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Whats the meaning of "550 Message does not pass DomainKeys requirements for domain ..."

VMWARE asked
Last Modified: 2013-12-02

When I send mail to certain domains, i receive this message: "    POP3.bcn.domainxxx.com[] said: 550 Message does not pass
    DomainKeys requirements for domain yyy.com (in reply to end of
    DATA command)
whats the meaning of this message?, and how i can avoid it?.

Thanks in advance
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-> http://en.wikipedia.org/wiki/DomainKeys

they check your sending server against the DomainKeys-entries and it doesn#t succeed.
So they blacklist your mail(server) and refuse the mails

Do you have set the rDNS-entry from your IP to a rDNS-Name properly?
Top Expert 2005
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I'm got my email recipient similiar feedback when they send email to me.
"550 Message does not pass DomainKeys requirements for domain ..."

Have any command or method to verify above mentioned reason - "Our email server check the sender email server" Acutally, the sender can email to me throug Gmail. Is say Gmail system will not applied this "Checking" setup

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