[OPLINTECH] email not delivered

[Karl Jendretzky via OPLINTECH]

Joe,

My bet is that the problem lies in the way that the listserv server is
sending the mail, and how that interacts with the anti-spoofing protections
for your domain.

Microsoft hosted mail will be using SPF protection to white list allowed
sender ips, and DKIM to sign outgoing emails with a private key so that
receiving servers can verify that the message hasn't been modified in
transit.

The kicker with listservs is that they often send the email "From" your
address (against your SPF rules) and then slightly modify the email before
redistributing it (breaking the DKIM signature).

On the OPLIN listservs I've modified the server behavior so that the "From"
address is "oplintech at lists.oplin.org", and the DKIM signature is scrubbed
from the email (which still technically passes, but is considered fishy).

If this is the case it's something the listserv administrator will need to
handle.

Karl Jendretzky
IT Manager - Ohio Public Library Information Network(614)
728-5252karl at oplin.ohio.gov


On Tue, Jun 20, 2017 at 10:45 AM, Joe Knueven via OPLINTECH <
oplintech at lists.oplin.org> wrote:

> Good day everyone,
>
>
>
> I’ve noticed a situation and I was wondering if anyone else has seen
> this/has a good idea for a solution.
>
>
>
> I have found over the last year or more that when I send emails from my
> library account to some lists that some  individuals on the lists are not
> seeing my emails, only the replies to them from other list members.
>
>
>
> In the two particular cases where I am certain this has happened, both
> individuals who were not getting the originals were in academic libraries
> at relatively small colleges.  In one of those two cases, the recipient I
> know had more general technical knowledge than I do, which makes me think
> this isn’t just people not knowing how to find their spam folder.
>
>
>
> My email is setup through Microsoft’s Office 365 Educational (I think they
> call the level “E1”), which is freely available to public libraries level.
> In the most recent case, I have looked at least a few blacklist searches
> for our domain as well as our primary oplin IP address, and both show up as
> not listed.
>
>
>
> Does anyone have any other thoughts on what is going on, or how to solve
> this?  I know that I could setup a gmail account and everyone would see it,
> but I hate to dump a portion of my work communications onto a personal
> account or maintain multiple work email accounts because of some vagary
> with O365..
>
>
>
> Thank you for any insights.  Have a good day.
>
>
>
> Joe
>
>
>
>
>
> Joseph Knueven, Director
>
> Germantown Public Library
>
> 51 North Plum Street
>
> Germantown, OH 45327
>
> 937-855-4001 <(937)%20855-4001>
>
>
>
> _______________________________________________
> OPLINTECH mailing list
> OPLINTECH at lists.oplin.org
> http://lists.oplin.org/mailman/listinfo/oplintech
>
>
>
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