Generally, it means a mail-server somewhere along the line between you and the recipient(s) is doing spam-filtering, based on a preset group of rules designed to detect spam.
Normal rules tend to look for things like:
- Is the email written 100% in HTML?
- Does the email consist of an embedded (not attached) image with no text?
- Does the text contain an overly-large percentage of capitals?
- Does the text contain a large number of website-links?
One or more of the above MAY be used, and there are lots more that can be used...
Im not very up on these things mate so youl have to excuse me for being ignorent on the subject. I was trying to do a simple reply to an email, with no attatchments no links no nothin. Iv tried mailing other addresses too but they wont work either. What should i do to rectify this? thanks for the help mate
If you're interested in the FULL list used by one of the more recent (and more popular) anti-spam "scoring" systems, have a look
here - it's a VERY long, list, though.