Looking for Yahoo eMail contact

[Marc Storck <mstorck () voipgate com>]

Hello,

I’m looking for a Yahoo email administrator who could contact me offlist.

I have a customer with a clean record that is getting thsi error:

Error: "421 4.7.1 [TS03] All messages from x.x.x.x permanently deferred" when sending email to Yahoo

The customer is a local non-profit and sends a very limited amount of emails to members, suppliers and other contacts. 
Mailing-lists are only used to contact members of the NPO.

I checked the recommendation listed at
https://help.yahoo.com/kb/postmaster/SLN3436.html

and checked his IP address on several “multi-rbl” lookup sites. All looks clean.

So I need more input to understand what we need to correct.

Thank you very much in advance.

Best regards,

Marc

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