Ha! Just got another email from our tireless ad trafficking guy Dan Zebroski: (typos mine)

"Another case of those dumb s*pam firewalls. A client provided text for their ad, it was loaded with our favorites, such as f*ree and c*lick to d*ownload. When I replied to their email, I said please change your ad because a number of the companies are turning away emails with those words in the text.

I sent the reply to them, not changing any of their text that was in an attachment, well about 30 to 45 seconds later, I received the following message:

Your message did not reach the intended recipient, it was rejected by email security for containing either; S*PAM, graphic
material or unsafe attachments. If you feel that this is an error please email the postmaster at.

Needless to say once we sent the original message and the error message to her home account. I didn't have very much trouble
convincing them that they needed a change on their creative."