problem when receive mail from distribution list of other mail server
i am managing a mail zimbra 6, i have a problem when receiving email. This is my description:
my email domain: @abc.com
some users: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org
my email customer domain:@xyz.com
some users: email@example.com, firstname.lastname@example.org
on mail server of my customer they created an distribution list: email@example.com including: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com
when firstname.lastname@example.org sent an email to distribution list email@example.com, it sent to user4@xyz ok, but it did not send to firstname.lastname@example.org, email@example.com,
firstname.lastname@example.org. it sent to mail admin of zimbra server email@example.com
i dont know why that and i tried with google app mail server instead of my customer, it is the same.
hoping that you can help me.