I'm currently deploying a standby content scanning server.  I know that 
more than 1 SPAMD server can be specified in the Exim config and my 
understanding is that if 1 is down it will try the next, much like 
specifying more than 1 SQL server, etc.  What I'm fuzzy about is the 
av_scanner property, I want to follow this same scheme with clamd.

I would think this should work:
av_scanner = clamd:host1 3310 : host2 3310

If I deploy my config with the above option, when I shut down clamd on 
host1 I get a failure and the message bypasses the malware check rather 
than checking the second server. Note I have defer_ok on my malware 
check for the chance my clamd box is down.

Am I missing something here?  Doesn't the av_scanner config option 
support multiple hosts?  It would make sense that it does in order to 
spread load across multiple servers.  I could use round robin DNS and 
point a DNS entry at both servers, but that still does not solve my 
problem of if 1 host is down.

Thanks,
James

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