Hi,

> collecting statistics is fine, publishing a policy will make your users hate 
> you, and you will deserve it.
Well, DMARC is like a lock on a door: It will keep valid users out too. You 
must hand everyone a key and they must use it (and never lose it). Even the 
neighbor that feeds the cat. For locks, most people agree it is the right 
method. 

So, for someone bitten by the 'lock', John here below, his reaction can be 
understandable. But you may still need a good lock. Situations differ. 

Personally, I think that monitoring doesn't offer much (it is like reporting a 
break-in to the police: It does not help much). So if you have phishing/malware 
mails going around: Secure the house. 


David Hofstee

Deliverability Management
MailPlus B.V. Netherlands (ESP)

-----Oorspronkelijk bericht-----
Van: mailop [mailto:mailop-boun...@mailop.org] Namens John Levine
Verzonden: Thursday, June 18, 2015 1:59 AM
Aan: mailop@mailop.org
CC: matthew.bl...@csulb.edu
Onderwerp: Re: [mailop] DMARC in education

>Looking at implementing DMARC for my institution.

See the answers on NANOG.

tl;dr, collecting statistics is fine, publishing a policy will make your users 
hate you, and you will deserve it.

R's,
John

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