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Iam using Zimbra 5.0.16.It was a fresh install being two days old.The problem is
my mailserver ip is blocked by spamhause and others.They says that toomany spams are sent by my IP and are blacklisted.How can i strengthen the security of my mail server ?
Ay help is appreciable for tis newcomer
Thanks in advance
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Wiki
Source
RBL-increase in security 
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