Yahoo 421 4.7.0 [TS02]

I got a very annoying, and upsetting error from Yahoo today.
"

Delay reason: SMTP error from remote mail server after initial connection:
   host f.mx.mail.yahoo.com [98.137.54.237]: 421 4.7.0 [TS02] Messages from [ip hidden] temporarily deferred due to user complaints - 4.16.56.1; see http://postmaster.yahoo.com/421-ts02.html

"

Here's what I sent to Yahoo today:
What the heck did I do to get this error? I innocently emailed someone on your system. My IP address and my hosts IP address are NOT blacklisted ANYWHERE.
I emailed 2 people on Yahoo this weekend, one of them (not the one pasted above) is my own mother in Canada who has recently had a bloody stroke, but your cyber police decide that my mother can't have my bloody email... WHY? TELL ME THE TRUTH. WHY DID YOUR SERVER PREVENT ME FROM EMAILING MY SICK MOTHER?

I AM FUMING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I do NOT SPAM ANYONE.
I do not EXCESSIVELY USE YOUR Bloody servers.

I just want to send an email to TWO people, is that too much?