Josh (the blog)

I’ve delivered simple, clear and easy-to-use services for 20 years, for startups, scaleups and government. I write about the nerdy bits here.


@joahua

Trend Micro spam filtering

A client contacted me a few days ago about a message sent by a mailing list script I’d written being falsely tagged as spam by their Trend Micro filtering system. They wanted me to change a few things in the mailing list output to see if it made a difference, but I’m trying to track down exactly WHAT the messages are scoring points on and WHY, rather than changing things in an ad-hoc fashion in the hope of hitting something.

Trouble is, there’s close to no documentation on Trend Micro’s free desktop filtering for Outlook, and all I can gleam from the mail headers is this obscure line:

X-tis-spam: score=7.80000 (90,112102,110534,112020)

Great, hey? Has anyone had any luck/experience with filtering before? I don’t even know if it’s what’s caused that line to be added to the headers — it could be any one of the three other mail servers the message passed through before it got to his inbox!