Yahoo! Mail bouncing Spamcop replies to reports

Logging in to Spamcop I received the following notice:

"Bounce error
Your email address, [email protected] has returned a bounce:
Subject: Delivery Status Notification (Failure)
Reason: 5.4.7 - Delivery expired (message too old) [Default]
451-'mta121.mail.ukl.yahoo.com Resources temporarily unavailable. Please
try again later. UP Email not accepted for policy reasons. Please visit
http://help.yahoo.com/help/us/mail/defer/defer-04.html [#4.16.4:190].'

Please ensure your email account is reliable, then click below"

The link to Yahoo help explains that it could be because of Yahoo's
anti-phishing detection. As I regularly report phishing emails to Spamcop
any replies from Spamcop will bounce if they are caught by Yahoo's
ant-phishing technology.

I wrote to Yahoo! using the form at the following link
http://add.yahoo.com/fast/help/us/mail/cgi_defer (who knows if they will
read it) the following:

"I am not a representative of Spamcop.net but a user so I do not have the
info requested above nor a copy of the email in question.

"I did receive a notice from Spamcop.net at their website that an email sent
to my Yahoo address bounced - probably because it contained a copy of a
phishing email I reported to spamcop. Please note that if Yahoo Mail will
bounce emails from Spamcop on this basis it makes Spamcop unusable with
Yahoo Mail and vice-versa. To correct this you could update your
anti-phishing filters to allow email from Spamcop (which often contain
copies of phishing emails reported to Spamcop).

"Without this my use of Yahoo! Mail is seriously impaired as I am a
dedicated Spamcop user."

It might be good if Spamcop contacted them at the same form to provide the
necessary info to stop this happening.