You can disable the backup schedule for those retired machines. 
Login to your backuppc GUI: 

Select a host
        Edit Config (under the host, not the general config)
                Schedule
                        BackupDisable: check Override, and set the Value to 2

This will disable the backup schedule of that host, and Backuppc see will not 
notify you, yet it will not delete the host nor its backup sets. 
However, those backups might be deleted later along the way according to your 
retention policy. 

I hope this answer is clear. 

Best regards 

-------------------------
Ali Kalamchi,
Senior Technical Sales Engineer,

Communicate without boundaries

Talia Deutschland GmbH
Mitterweg 36
82399 Raisting
Germany

T:  +49 (0)8807 3692223
F: +49 (0)8807 2140036
E: ali.kalamchi AT talia DOT net
www.talia.net

-----Original Message-----
From: kpolberg AT kpolberg DOT net [mailto:kpolberg AT kpolberg DOT net] 
Sent: Tuesday, February 9, 2016 4:10 PM
To: backuppc-users AT lists.sourceforge DOT net
Subject: Re: [BackupPC-users] Retiring hosts without losing backups



On 01/29/2016 09:29 PM, Kenneth Porter wrote:
> I've got backups for quite a few hosts that have been retired. I 
> regularly get nag emails telling me that these hosts haven't been backed up 
> recently.
> What's the best way to tell BPC to stop sending notification emails 
> for a host without deleting its data?
>
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>
In the host specific config file set:

$Conf{BackupsDisable} = '1';

-kp

------------------------------------------------------------------------------
Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + 
Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end 
web transactions and take corrective actions now Troubleshoot faster and 
improve end-user experience. Signup Now!
http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
_______________________________________________
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BackupPC-users AT lists.sourceforge DOT net
List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
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Project: http://backuppc.sourceforge.net/

------------------------------------------------------------------------------
Site24x7 APM Insight: Get Deep Visibility into Application Performance
APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month
Monitor end-to-end web transactions and take corrective actions now
Troubleshoot faster and improve end-user experience. Signup Now!
http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
_______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki:    http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/