Overeager spam fighting for link?

I came across this page today:

Subject: Re: redacting password in SQL statement in server log

The spam filtering[1] that occurs for the header information appears to have been applied to the bottom link as well - making it 404. Not sure where that is getting applied, but doing a "raw source" and checking my original inbox seems to indicate the link at the bottom of the email was sent unobscured.

[1] In which alice@gmail.com becomes alice(at)gmail(dot)com

Cheers,

Greg