DKIM is relatively easy to do, just get on with the program...

It seems very unlikely that for 50 messages a day, Yahoo would spend some
resources to help you not to have to spend some resources to enable DKIM.

On Mon, Mar 28, 2016 at 3:08 PM, Carl Byington <c...@five-ten-sg.com> wrote:

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> Hash: SHA512
>
> I am trying to help a very small isp with a yahoo.com delivery issue.
> They are getting "421 4.7.0 [TS02] Messages from 208.88.52.225
> temporarily deferred - 4.16.56.1; see
> http://postmaster.yahoo.com/errors/421-ts02.html"; errors.
>
> Volume is less than 50 total messages per day going to yahoo.com
> addresses. Clients use their own domain names.
>
> https://help.yahoo.com/kb/account/yahoo-complaint-feedback-loop-
> service-faq-sln26007.html says "For bulk commercial senders or senders
> of transactional mail, DomainKeys or DKIM is the best option. ISPs
> should contact Yahoo for other options.", but gives no contact address
> for an ISP. Is that a mistake? Is the Yahoo feedback loop only available
> for folks that DKIM sign outbound mail?
>
>
>
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