We have now been running postgrey (http://postgrey.schweikert.ch/) on our umn.edu for more than a month. A new IP will see a delay of 5 minutes. IPs will then be added to the database and further email from this IP will not be grey listed.  We have not had a single user notice that we implemented this process.  (We exclude local IPs from being grey listed. We believe this has helped us somewhat dramatically in stopping the spammers at the door.)

- Jane

On Tue, Mar 28, 2017 at 9:34 AM, Jane Jewett <[log in to unmask]> wrote:

This is of direct concern to me as I run several lists through the U of MN listserv server -- and those lists include lots of non-U of MN subscribers.

What are the potential implications for non-U of MN subscribers with use of postgrey?

On Tue, Mar 28, 2017 at 9:30 AM, Pete Weiss <[log in to unmask]> wrote:

What are the implications for list subscribers from outside UMN.EDU? and do they know it? e.g., maybe it is sufficient for UMN.EDU subscribers and not necessary (or perhaps not desirable) for non-UMN.EDU?

Pete

On 3/28/2017 10:26, Jane Gehan wrote:

Hello, We are running postgrey on our incoming email servers, except the listserv server. We are planning to begin using this on our listserv server soon. We will either share a grey list database with our other servers, or set one up for use exclusively by the listserv server.

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Jane Grimsbo Jewett

Minnesota Institute for Sustainable Agriculture

www.misa.umn.edu

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The best fertilizer for the land is the footprint

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Jane K. Gehan
Messaging & Calendaring Services         Email:  [log in to unmask]
Office of Information Technology              Phone:  (612) 626-1810
University of Minnesota                             Office: 626K WBOB

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