[thelist] Spam filters

[Jason Handby]

Hi all,


I have been working on a website which allows people to register and then
search a database according to various criteria. Once the user has finished
searching, the site emails them a detailed report on their search results
that they can refer back to. This email is formatted as HTML.

Recently the client has noticed that they are having more problems with
emails being blocked by users SPAM filters and not getting through. We know
that the email is not SPAM, but clearly it looks like SPAM as far as (at
least some) filters are concerned.

Do any of you have any general suggestions / guiding principles for creating
emails that don't look like SPAM? Are HTML emails more likely to cause
problems than plain-text ones? Does the length of the email matter? Are
there any key phrases we should be avoiding? (We're not selling Viagra :-) )


Any experiences / suggestions / links to resources would be gratefully
received.


Ta




Jason