Good E-Mail Being Bounced

[FIOSGlitch]

Suddenly e-mails that I am sending to people that I regularly exchange e-mails with are being bounced with the following explaniation...

The original message was received at Sat, 13 Aug 2011 00:19:12 -0600
from pool-74-98-182-80.nrflva.fios.verizon.net [74.98.182.80]

----- The following addresses had permanent fatal errors -----
<theguyimsendingto@hisdomain.com>
(reason: 550 permanent failure for one or more recipients (theguyimsendingto@hisdomain.com:550 5.7.1 Message rejected as spam by Content Filtering.))

----- Transcript of session follows -----
... while talking to d5489a.ess.barracudanetworks.com.:
>>> DATA
<<< 550 permanent failure for one or more recipients (theguyimsendingto@hisdomain.com:550 5.7.1 Message rejected as spam by Content Filtering.)
554 5.0.0 Service unavailable

There is no questionable content of any kind!

So what gives, and how can I fix the problem?

[djm12]

Did you add your recipient to your "Safe Recipent" list?  Try it.

In MS Outlook, right click on the message and click junk e-mail, add recipient to safe recipients list.

Also, add the person's e-mail to your contacts list in both outlook and verizon.

[tns]

Sounds more like filters on the recipient side.

Note smtp message is from

while talking to d5489a.ess.barracudanetworks.com