Can anyone give me a simple answer to this error?
We would like to receive email from an individual at earthshift.com but they are claiming we are blocking their email and we are not - as a matter of fact they are on our whitelist as an approved sender. It looks to me like their server is the rejecting source. I pasted the error message below
Subject: Fwd: FW: Undelivered Mail Returned to Sender
Still not working, see below. Can you ask your provide what's going on?
---------- Forwarded message ----------
Date: Wed, Apr 9, 2014 at 9:40 AM
Subject: FW: Undelivered Mail Returned to Sender
From: Mail Delivery System
Sent: Wednesday, April 09, 2014 9:11 AM
Subject: Undelivered Mail Returned to Sender
This is the mail system at host mackey.greenmountainaccess.net.
I'm sorry to have to inform you that your message could not be delivered to
one or more recipients. It's attached below.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can delete your own
text from the attached returned message.
The mail system
said: 550 SPF: 126.96.36.199 is not allowed to send mail from
(in reply to RCPT TO command)