spam from non-account on internal domain

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sangamc
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Joined: Sat Sep 13, 2014 12:39 am

spam from non-account on internal domain

Post by sangamc »

Hi Zimbra-ites :)
On my zimbra server I have several domains. Lately I've been seeing spam coming from a non-existent account on one of my internal domains. All the messages are coming from voice*@mydomain.com where * = a random number.
I'd like to block this spam without affecting legitimate users that do have accounts on mydomain.com. Is this possible? I was thinking something like block all mail from random-user@palmettoltc.com if random-user does not have an actual account.
I am also open to other suggestions. The above was just the first idea that popped into my head.
Let me know if any more details are required.

Thanks
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